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TriggerShims
Ruger Double Action Revolvers
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Manufacturer of
Trigger Shims Brand
American Made Gun Shims
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ShivelySales.com
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Gun ShimsGun Smith Supplies
Since 2008
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We Manufacture the Widest Selection of Gun Shims to be Found Anywhere on the Planet
100% American Family Owned
Shively Sales - Manufacturer of
TriggerShims Brand
Gun Shims
in
Michigan Center, Michigan
"Better to be poor and honest than to be dishonest and rich." Proverbs 28:6
God Bless the U.S.A.
American Made Gun Shims
TriggerShims Brand
is the
Original Manufacturer
of
RDA Shims used World Wide!
Shim Kits for the Ruger Double Action
SP101 ~ GP100 ~ RedHawk and New RedHawk, Super RedHawk and Alaskan
Ruger Security-Six, Service-Six and Speed-Six
All Shims Available in Your Choice of Thickness
Ruger Gun Spring Kits by Wolff
TriggerShims Shim Kits
Hammer & Trigger Shims
TriggerShims Brand Cylinder / Endshake Shims
Quality Shim Kits for Ruger Revolvers
PAGE INDEX
Ruger Double Action Revolvers
Quick Links to Items on This Page
RDA Hammer/Trigger Shim Kits - StandardStandard RDA Hammer Shims
SP101 ~ Small OD RDA Hammer Shims
RDA Hammer Dog Shims
RDA PistolSmith 18 Shim Pak
RDA PistolSmith 44 Shim Pak
RDA Hammer Spring and Shim Package - Combo Kit
RDA Cylinder Shims
Super Redhawk & GP100 Yoke Shims
RDA Cylinder Endshake info
Ruger Redhawk Mainspring Lever Pivot Pin Shims
RDA Hammer Spring Strut Shims
New Redhawk and GP100 Extended Firing Pin Shims
Ruger LCR / LCRX / LCP Shim Kits
Wolff Gun Springs
RDA Gunsprings by WolffTech Tips
Guide to Installing Shims in Ruger Double Action (RDA)
Revolvers
TECH TIPS: All Ruger Double Action Tips
TECH TIPS: Cylinder Shim YouTube Video Links
TECH TIP VIDEO: Ruger Double Action Hammer Shims Video
TECH TIP VIDEO: RDA Hammer & Hammer Dog Shims Video
TECH TIP VIDEO: RDA Trigger/Hammer Complete Video
TECH TIP: Kevin Wilson's Ruger Double Action Trigger Job Guide
TECH TIP: Jay Slater's ~ The Grandmaster's Guide to the GP100
Ruger Factory RDA Disassembly Video
TECH TIP: Hammer Spring R&R Fixture
TECH TIP: Ruger Factory Videos
RDA Ejector Bit Tool
👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION
The easiest way to Measure your Trigger or Hammer assembly is with a simple blade type feeler gauge.
I sell a Nice ~ A. Made set you can include in your orders.
It comes with a Manufacturers Lifetime Warranty
This 32 Blade Gauge will measure from .0015" up and is perfect for general use.
The price includes Free U.S. Shipping
Hi Lance! Well I finally found a few minutes to install my shims and I must say that my Super Redhawk Alaskan feels like a different gun! Absolutely Amazing Difference !
Thank you for a Great Product and Great Service! I will spread the word!
Nick in CA
This is only my third time using TriggerShims.com to upgrade a revolver’s trigger. I always pick a standard assortment of shims and springs. The improvement is impressive! The customer service is even better! I’ll be back soon to upgrade a lever gun or two ~ Mike in SC
Item # RDA-H/T Pak
RDA Hammer & Trigger Shim Kits
Ruger Double Action GP100, SP101, RedHawk, Super RedHawk and Alaskan
Also Fits Ruger Security-Six and its variants, the Service-Six and Speed-Six
RDA Shims also fit Rimfire Models
Our Trigger and Hammer Shim Kits are designed to work with the 3/32 Trigger Pin and a 3/16 Hammer Pin standard on all Ruger Double Action Revolvers.
Our Ruger Double Action Hammer and Trigger Shim Kits can be used to remove excess clearance found from varying factory manufacturing tolerances.
Shimming your Hammer & Trigger will remove much of the Excessive Side to Side Movement from these parts, keeping them better aligned, making for a Much Smoother Consistent Feel.
Shimming the Hammer will stop it from Rubbing the Frame and the Friction caused, allowing for Better and Stronger Primer Strikes, and a Lighter Hammer Spring to be installed Reducing Hammer and Trigger Pull.
Our Ruger Double Action Trigger Shims will stop the Trigger from rubbing the trigger housing and reduce friction to Smooth Trigger Pull.
When used in combination with Wolff Reduced Power Spring Paks, and some polishing and care, you can have the feel only Custom Firearms have.
No DIY Trigger Job is Complete without TriggerShims Brand Shims!
Trigger Shims Measure .095" X .251" ~ Thickness from .002" to .010"
Hammer Shims Measure .189" X .499" ~ Thickness from .002" to .010"
New for 2022 .0015" Thickness also available by request
*NOTE ~ Don't know what Pak to order?
If you don't pre-measure your clearances following our Video Instructions,
Our RDA PistolSmith 18 Shim Pak
available below is a Popular and Versatile Kit, as is our RDA PistolSmith 44 Shim Pak
Ruger RDA Revolver Hammer ~ AND ~ Trigger Shims Pak
Our Hammer AND Trigger Shim Pak Assortments BELOW are as follows;
2 Pak comes in .002" ~ You Choose ~ Hammer or Trigger
4 Pak comes with 2 H&T each .003"
8 Pak comes with 2 H&T each .003", .005"
12 Pak comes with 2 H&T each .003", .005", .007"
16 Pak comes with 2 H&T each .002", .003", .005", .007"
20 Pak comes with 2 H&T each .002", .003". .004", .005" and .006"
24 Pak comes with 4 H&T each .002", .003", .005"
Lances "Gunsmith Mix" 30 Pak RDA Shims has the following;
Trigger Shims - 4 X .002", 4 X .003", 4 X .004", 2 X .005"
Hammer Shims - 4 X .004", 4 X .005", 2 X 006", 4 X .007", 2 X .009"
Free Economy Shipping U.S.
-ORDERING INSTRUCTIONS-
- Box 1 ~ Click Down V to Choose ANY Pak Quantity for Best Pricing
- Box 2 ~ Click Down V to Choose From Hammer AND Trigger, or Hammer Only or Trigger Only
- Box 3 ~ for Special Request of Thickness or Assortment
Item #: SS-RDA-Pak 2020
Hi Lance, Before I did anything to my new GP100 the double action pull bottomed my trigger pull gauge, and single action pull was over five pounds. I installed a Wilson spring kit and reduced the trigger pull to 9 pounds DA and 3-1/8 pounds SA. The gun fired 200 rounds without a miss. This morning I installed hammer and hammer dog shims and DA pull fell to 7-1/2 pounds! Good deal! Thank You, Tom
TT~ RDA Shim Guide
TECH TIP: Shims and Clearance
When shimming an RDA Trigger, an ending clearance of roughly .003" should be left.
If your Trigger Assembly is within that range from the factory, you are good and should leave it alone. If you clearance is in the .004" to .006" range, a single shim placed on the Off-Hand Side of the Trigger (side opposite your gun hand) will be sufficient and helpful.
A clearance of .006" or more use two shims.
PDF TECH TIP:
Read Lances article about RDA Hammer, Trigger, Hammer Dog Shims Here:
Guide to Installing TriggerShims Brand Gun Shims in Ruger Double Action (RDA) Revolvers
Click Here to Open My Printable PDF:~ Guide to Installing Shims in Ruger Double Action (RDA) Revolvers ~
Item - Standard RDA Hammer Shims
Standard RDA Hammer Shims
Ruger Large Frame Double Action Hammer Shims
- GP100
- SP101
- Redhawk
- Super Redhawk
- Alaskan
- Security Six
This is Our Original Size Hammer Shim ~ .189" X .499"
Quality Hammer Shims for Ruger GP100, SP101,
RedHawk, Super RedHawk, Alaskan and Security Six Series
This is a Hammer Shim Only Pak and if you are installing only one set of shims to improve your revolver, Hammer Shims are it!
TriggerShims has been manufacturing these shims for almost two decades, I like to think we started a trend when these same style Hammer Shims were installed by the Ruger factory when the New Ruger GP100 Match Champion was introduced in 2014
With some careful polishing, a set of Wolff Reduced Power Springs, a few TriggerShims Brand Shims, almost any Ruger Revolver can feel like a Match Champion... Or Better ;-)
No DIY Trigger Job is Complete without TriggerShims Brand Shims!
Hammer Shims Measure .189" X .499" ~ Thickness from .002" to .010"
New for 2022 .0015" Thickness also available by request
Please Specify your required thickness ~
If thickness is not specified, I will ship My-Best-Guess Assortment depending on your quantity ordered ~ a set of Hammer Shims in the range of .004" to .008" is most common
👉Assortment List in Box Below
Free Economy Shipping U.S.
- Box 1 ~ Click Down V to Choose ANY Pak Quantity for Best Pricing
👉Link To: ADD TRACKING and Guaranteed Delivery UPGRADE (USA Only)
Our Ruger Standard RDA Revolver Hammer Shim Pak Assortments
Our Standard RDA Hammer Shim Pak Assortments BELOW are as follows;
2 Pak comes in .002"
4 Pak comes with 2 each .003" and .005"
6 Pak comes with 2 each .002" .003", .005"
8 Pak comes with 2 each .002" .003", .005", .007"
12 Pak comes with 4 each .002", .003", .005"
16 Pak comes with 4 each .002", .003", .005", .007"
20 Pak comes with 4 each .002", .003". .004", .005" and .006"
24 Pak comes with 4 each each .002", .003", .004", .005", .006", .007"
~ OR ~
Pick Any Quantity and List Your Choice in Box Below
Our Ruger Stacking Pak
18 RDA Revolver Hammer Shim Pak Assortment
Used singly or stacked, multi-pak is handy for multiple guns
👉18 Pak $20
Our Stacking Pak RDA Hammer Shim Pak Assortments BELOW are as follows;
6 each .002", .003". .004"
Thanks Lance! I was so happy how the shims on my Redhawk turned out, I figured I’d do my GP100 as well! Best, Zack
Small OD RDA Hammer Shims
For Use In: SP101 / GP100 Revolvers 2022 and up with Milled Recess Hammers
TriggerShims Small O.D.
RDA Hammer Shims
Ruger SP101 / GP100 Frame Double Action Revolver
Milled Recess
MIM Hammer Shims
For Use In: Ruger SP101 and GP100 double-action revolvers with MIM hammers featuring a .421" (27/64") milled recess, introduced in select models starting in 2022
These precision stainless steel shims are designed with a smaller outside diameter (OD) of .419" to fit the milled recess of post-2022 Ruger SP101 and select GP100 Match Champion hammers, matching the specifications of factory-installed shims.
Unlike our standard .499" OD hammer shims, which are suited for external frame shimming in Ruger RDA revolvers (including Redhawk, Super Redhawk, Alaskan, Six-Series), these small OD shims are engineered specifically for the recessed pivot area of newer MIM milled recess hammers to ensure proper centering and eliminate frame drag, and can be used with the factory shims stacked for best fit.
Small OD RDA Hammer Shim Pak Assortments are as follows;
2 Pak comes in .002"
4 Pak comes with 2 each .002" and .003"
6 Pak comes with 2 each .002", .003" and .004"
8 Pak comes with 2 each .002", .003", .004" and .005"
12 Pak comes with 4 each .002", .003", .004"
20 Pak comes with 4 each .002", .003". .004", .005" and .006"
24 Pak comes with 6 each .002", .003", .004" and .005"
30 Pak Gunsmith Special Assortment comes with 6 each .002", .003", .004", .005" and .006"
50 Pak Your Assortment
-OR- Choose ANY Pak and Specify Your Requested Thickness in Comment Box
This New Smaller OD Shim is made to match the New Ruger Factory Installed Shim used with the Milled Hammer shown in photo
NOTE: Ruger implemented this change in 2022 for some SP101 (serial numbers ~571-xxx) and GP100 models to streamline assembly and enhance reliability. Other models (Redhawk, Super Redhawk, Alaskan, and the older RDA Six-Series) typically lack milled recesses but are compatible with TriggerShims.com’s standard shims for hammer, trigger, or cylinder adjustments. To confirm your hammer has a milled recess, inspect the pivot area after disassembly. Firearms information evolves, so check your model’s specifications. TriggerShims Brand Gun Shims © 2008-2025
SMALL OD Hammer Shims Measure .189" X .419" ~ Thickness from .002" to .010"
Matches Ruger Factory Diameter for Milled Recess Hammers
ITEM # RDA/SM-OD Hammer
Read Lance's in-depth article about Ruger RDA Milled Recess Hammers Here:
Click Here to Open Printable PDF
Unlock the secrets behind Ruger's post-2022 innovations in the SP101 and GP100 revolvers, including factory-installed recessed milled pockets and hammer shims designed to enhance centering, reduce frame rubbing, and deliver smoother actions straight from the box. This detailed tech tip dives into affected models, performance benefits, installation insights, and why aftermarket precision shims from TriggerShims.com (available in .002" to .010" thicknesses) are essential for fine-tuning SP101, GP100, Redhawk, and Super Redhawk models—whether addressing hammer drag, endshake, or custom trigger jobs. Perfect for gunsmiths and enthusiasts searching for "Ruger SP101 shims" or "GP100 hammer upgrades," this guide compiles forum evidence and expert advice to keep your revolver running reliably under .357 Magnum loads and beyond. Download the full PDF guide here for offline reference and detailed tables.
Lance, our emails helped me turn my Ruger SP101 327 Federal Magnum Pawn Shop Reject into a SMOOTH Pistol.
I took your recommendation on .010" Hammer Shims, .004" Hammer Dog Shims, .004" Trigger Shims and a .003" Cylinder Endshake Shim.
Your website helped me turn a donor screwdriver into a disassembly tool that works perfectly. (for the Cylinder Ejector disassembly)
Everything locks up tight, trigger, hammer and cylinder are adjusted perfectly.
Double Action pull is 5.5 lbs and single action pull is 2.25 lbs.
Your knowledge and products helped me turn this into an excellent pistol plate revolver.
Thanks, John in WY
TECH TIP: Reviews
Dear Lance,
The shims you sent me are just what I needed, my GP100 match champion is now like a fine oiled sewing machine! I can't thank you enough, God Bless, and I will be one of your customers for a long time!
Oh, the outside diameter on the hammer shims really stabilized the hammer side shake, it drops dead square now. I am sooooo happy, well God Bless, Yours Truly, Bob in NY
Ruger GP100 Match Champion
Hi Lance, the Hammer Shims came in yesterday. I installed them last night on my Ruger Match Champion and they work great. They are a little larger on the OD than the shims that came in the gun and this has really helped stabilize the hammer - no more rubbing on the frame and the pull weight came down about half a pound on my gauge. I am very pleased. Thanks for a great product!
Tim in TX
Mr. Shively, I got the hammer & hammer dog shims today that you mailed out Monday. Thank you for such quick shipping! I hated my GP100, it fact I was ready to sell it as it was unshootable. Both single and double action were horrible, to the point that it wouldn't group even in single action. I got online and looked at videos as how to slick up the action, and your shims were the last step. Success! Double and single action are slick as silk! Thank you for helping me in my GP100 rescue! Brad in KS
The shim kit (for GP100) I recently ordered arrived today. Thanks for the quick shipping. I’m quite familiar with disassembly and reassembly of Ruger revolvers, but your shim installation videos and recommendations were great. The shims popped in easily and made an immediate improvement in the feel of the action. Great products and great customer support at a very fair price. I’ll be ordering more soon! ~ Bill in VA
Mr. Shively,
I just got your hammer shims installed on my Ruger GP100 - it's so much better! The gritty feel of hammer rubbing frame is gone, and I have a smoother, predictable trigger pull. Feels just like my Ruger Redhawk that has your shims installed. I know I will enjoy shooting this revolver more with that gritty feeling during the trigger pull gone. Thank you for offering a fine product that greatly increases shooting satisfaction for such a reasonable price. Take care brother, Garrett in Indiana
RDA Hammer Dog Shims
Ruger Double Action Hammer Dog Shims ~ Improve Your Double Action Trigger Pull
Our Shims will fit 5/64" Hammer Dog Pins Standard on Ruger Double Action Revolvers and you will find many if not most RDA revolvers will have at least .006" to over .014" excess clearance in the Hammer Dog Slot
Many of My Customers Claim the Biggest Improvement you can make to your Double Action Trigger Pull after installing our Wolff Reduced Power Springs is to Shim Your Hammer Dog!
I recommend an ending clearance of about .002"
The Best Gunsmiths Know, No Trigger Job is Complete without TriggerShims Brand Shims!
My 6 or 8 Pak will give enough shims to stack and do most guns, while the 14 Pak Gunsmith Special Pak will fit many if not most all guns with a single set, or have enough to do several revolvers. You can also use a feeler gauge, measure your total clearance first, deduct 2 or 3 thou for ending clearance, and divide the result by two for 2 shims ordered with correct thickness
Photo to the Right Shows the Size of the Shim.
Installs Inside Hammer between Hammer and Dog as shown in Photo Below
Set end clearance to .002" - .003"
Hammer Dog Shims improve Double Action Trigger Pull
Available in .002" through .010" Stainless Steel
Ruger Double Action Hammer Dog Shim Paks
Standard Paks are as Follows;
2 Pak Comes in .002"
4 Pak Assortment comes with 2 each .002" and .003"
6 Pak Assortment comes with 2 each .002", .003" and .004"
8 Pak Assortment comes with 2 each .002", .003" .004" and .005"
12 Pak Assortment comes with 4 each .002", .003", .004"
14 Pak GS Special - with 2 each .002", .003", .004", .006", .007", and 4 each .005"
24 Pak Assortment comes with 6 each .002", .003", .004" and .005"
30 Pak Gun Smith Special Assortment comes with 6 each .002", .003", .004", .005" and .006"
50 Pak Your Choice Thickness Assortment
-OR- Choose any Pak and Specify your Thickness in Box
- Box 1 ~ Click Down V to Choose ANY Pak Quantity for Best Pricing
- Box 2 ~ Click Down V to Choose Assortmernt Pak
- Box 3 ~ for Special Request of Thickness or Assortment
*Note ~ Hammer Dog Clearance Varies Considerably, Our Popular 6 Pak or GS 14 Pak can be stacked or used individually to fit many variations
RDA Hammer Dog Shims
Item # RDA-HDS ~ .086" X .221"
Free Economy Shipping U.S. Only ~ International Add Postage
👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION
Lance: Thanks Again for the Prompt Shippment. The shims/springs worked fine, took 2 lbs off the single action and 4 lbs off the double action of my GP-100. Great Product, Great Job, Thanks Again, Steve in FL
SP/GP/SRH Combo Kits
Our PistolSmith RDA
Hammer Spring/Shim Package Kit
TriggerShims RDA PistolSmith Package Kit
SP101 / GP100 / Super Redhawk / Alaskan
Our PistolSmith 18 Pak GunShims and Wolff #11 Hammer Spring Kit Package
Each Package comes with (one) 11# Wolff Hammer Spring and My RDA 18 Pak PistolSmith Shim Kit (Sold Below)
This is My Favorite Spring, 11# is an Ideal Spring for Trigger Pull and Dependability!
Note: Not for 2011 and newer .22 Rimfire Models
10# and 12# Springs available by request
Package Kit $39.50
Free Shipping with Tracking ~ Ships USA Only - No Exports
I am often asked my advice ~ "Which kit is best for my gun?"
The 18 PistolSmith Kit is a good start, I have tried to use the more popular sizes that can be used singly or stacked/combined, while keeping the kit as small as practical.
If a larger kit is in your budget, the 44 Pak has a better selection, and will easily do 2 or 3 guns
RDA 18 PistolSmith
RDA 18 Pak PistolSmith Shim Kits
TriggerShims PistolSmith 18 Shim Kit
Home Pistol-Smith Shim Kit for GP100 / SP101 / RedHawk, Super RedHawk and Alaskan.
Without Measuring First, this assortment should give the best selection of thicknesses I can suggest, when used singly or stacked, for most any RDA New or Old.
This kit will do One Revolver Minimum, with Shims used Singly or Stacked Together
.002", .003", .004" Trigger Shims
.002", .003", .004" Hammer Dog Shims
.003", .005", .007" Hammer Shims
18 Pak Home Gunsmith RDA Kit......$27 Free Economy Mail
Economy Shipping Only on International Orders
👉Link To: ADD TRACKING and Guaranteed Delivery UPGRADE (USA Only)
RDA 44 PistolSmith
RDA 44 PistolSmith Shim Kits
TriggerShims PistolSmith 44 Shim Kit
Hammer / Trigger/ Hammer Dog Shim Pak
GP100 / SP101 / Super RedHawk / Redhawk
Security-Six, Speed-Six, Police Service-Six
This Kit is for the PistolSmith
Includes our Gunsmith 30 Pak Hammer and Trigger and also includes a
14 Pak of Hammer Dog Shims, and USPS First Class Tracked Shipping.
Easily Shims 3 to 5 Guns - I call it our RDA PistolSmith Kit - The 44 Magnum!
Has the following Shims -
Hammer - 16 Shims
2 X .009"
4 X .007"
2 X .006"
4 X .005"
4 X .004"
Trigger - 14 Shims
2 X .005"
4 X .004"
4 X .003"
4 X .002"
Hammer Dog Shims - 14 Shims
2 X .002"
2 X .003"
2 X .004"
4 X .005"
2 X .006"
2 X .007"
RDA 44 Shim Kit #RDA-PS44....... $44.00 Free Econony US Mail Shipping U.S.
👉Link To: ADD TRACKING and Guaranteed Delivery UPGRADE (USA Only)
Economy Shipping Only on International Orders
Ruger Redhawk
Mainspring Pivot Pin Shims
Ruger RedHawk Mainspring Lever Pivot Pin Shims
Quality Mainspring Lever Shims for Ruger RedHawk
These shims will better align the Mainspring Lever to Prevent Binding.
Use with RDA Hammer Shims to Smooth both Trigger and Hammer Pull
Measure and Install between the Lever Yoke and Frame
Set Clearance to .001" + to .002" for Best Results
Cure the Problem with the Mainspring Lever Canting and Holding the Trigger from Going Forward
(Will not fit Super RedHawk or Alaskan Series)
Available in .002" through .009"Choose Quantity for your Best Price and Specify Thicknesses in Box Below
Multiple Thicknesses may be listed together for Quantity Pricing
Nominal O.D. of .221" X I.D. of .095"
Sized specifically for the RH Lever, they can also be used for RDA Triggers ~ although smaller O.D.
Our Standard Shim Pak Assortments BELOW are as follows;
2 Pak comes in .002"
4 Pak comes with 2 each .002" and .003"
6 Pak comes with 2 each .002", .003" and .004"
8 Pak comes with 2 each .002", .003", .004" and .005"
12 Pak comes with 4 each .002", .003", .004"
20 Pak comes with 4 each .002", .003". .004", .005" and .006"
24 Pak comes with 6 each .002", .003", .004" and .005"
30 Pak Gunsmith Special Assortment comes with 6 each .002", .003", .004", .005" and .006"
50 Pak Your Assortment
-OR-
Choose ANY Pak and Specify Your Requested Thickness .002" - .009" in Comment Box
Free Economy Shipping U.S.
👉Link To: ADD TRACKING and Guaranteed Delivery UPGRADE (USA Only)
Box RDAHSS
Ruger Hammer Spring Strut Shims
Ruger GP100 / SP101 / Super RedHawk
Hammer Spring Strut Shim
Our Shims will fit the Ruger Hammer Strut and when placed on the Hammer Strut Seat, can slightly increase tension on the Hammer Spring
Used to Increase Reduced Power Springs ever so slightly when fine tuning
Use with Wolff Reduced Power Hammer Springs as Needed - as with 9 or 10 Pound Hammer Springs to Adjust Slightly Up
Available in .010" Thickness, can be stacked to adjust for Fail-to-Fire / Light Strikes
It would take 9 shims to add the equivalent of 1 coil turn of the 9# Wolff R.P. spring
Made Specifically to Fit RDA Main Strut and Match the OD of RP Springs
Full Temper 40 - 45 C Rockwell 300 Series Stainless Steel
Nominal O.D. of .299" X I.D. of .189"
Equivalent to a #8 Flat Washer ID with a Smaller OD to better match the Spring and Strut Seat
Comes Standard in .010" Thickness
👉Link To: ADD TRACKING and Guaranteed Delivery UPGRADE (USA Only)
Box R-TKC
Firing Pin Shims for GP100 / Redhawk
to fit TKC / Bowen Extended Firing Pins
TriggerShims Ruger GP100 / RedHawk
Extended Firing Pin Shim Set
Our Shims will fit the New Style Ruger Revolver Extended Firing Pins made for Models GP 100 and Redhawk by TK Custom and Bowen Classic Arms corporation
Click these links to find the Ruger Double-Action Extra-Length Firing Pin;
TK Custom
Bowen Classic Arms co.
Made Specifically to Fit Extended RDA Redhawk and GP100 Firing Pins
Full Hard Temper 40 - 45 C Rockwell 300 Series Stainless Steel
Nominal O.D. of .251" X I.D. of .198"
Comes Standard 8 Pak Assortment Thicknesses .002" - .009"
Also Available in 2 Pak and 16 Pak
8 Pak Kit.... $13.00.... Price Includes Free Economy First Class Mail Shipping U.S.
👉Link To: ADD TRACKING and Guaranteed Delivery UPGRADE (USA Only)
TECH TIP: Cylinder Shim Installation
RDA Cylinder Endshake
Barrel-Cylinder Gap and Endshake
The gap between the back of the barrel and the front of the cylinder is known as the Barrel-Cylinder (B-C) gap. The Front-To-Back Movement of the Cylinder is the Endshake.
In order to properly measure these clearances you will need a Feeler Gauge Set. K-D Tools USA Made # 161 Deluxe Feeler Gauge is available all over the internet and at most good auto parts stores for under $10
To check B-C gap, hold the cylinder rearward and insert the (thickest that will fit) feeler between the Barrel and the Cylinder, this is your Barrel-Cylinder Gap, write it down, it should be between .004" and .008"
Next, hold the cylinder forward and re-check the gap, write it down.
The difference between the two numbers is the amount of movement or Endshake your cylinder has, it should be between .001" and .004"
Our Cylinder Shims can be used to adjust your B-C Gap and Endshake.
~ Step by Step Disassembly Instructions ~
Click this link to go to Gunner's Journal for complete instructions on the GP100These instructions also apply to the SP101 and Super RedHawk ~
Gunners Journal / Iowegan’s Book of Knowledge for the Ruger GP-100 Revolver
Customer Videos ~ Links ~ Click Here to Go Down Page
Read Lances in depth article about B/C Gap and Endshake Here:
Click Here to Open Printable PDF:~ Understanding Cylinder-to-Barrel Gap and End-Shake in Revolvers: The Role of Cylinder Shims ~
Super RedHawk / RedHawk / GP100 Revolver
Cylinder / Endshake Shims
Our Shims will fit Super Redhawk,
Redhawk, GP100, Security-Six, Speed-Six, and Police Service-Six Double Action Revolvers.
Made from USA Full Temper 300 Series Stainless Steel
Nominal O.D. of .401" X I.D. of .299"
Our Standard Shim Pak Assortments are as follows;
2 Pak comes in .002"
4 Pak comes with 2 each .002" and .003"
6 Pak comes with 2 each .002", .003" and .004"
8 Pak comes with 2 each .002", .003", .004" and .005"
12 Pak comes with 4 each .002", .003", .004"
20 Pak comes with 4 each .002", .003". .004", .005" and .006"
24 Pak comes with 6 each .002", .003", .004" and .005"
30 Pak Gunsmith Special Assortment comes with 6 each .002", .003", .004", .005" and .006"
50 Pak Your Assortment
-OR- Choose ANY Pak and Specify Your Requested Thickness in Comment Box
Free Economy Shipping U.S.
👉Link To: ADD TRACKING and Guaranteed Delivery UPGRADE (USA Only)
Ruger SP101 Revolver Cylinder / Endshake Shims
Our Shims will fit the Ruger SP101
Made from USA Full Temper 300 Series Stainless Steel
Nominal O.D. of .337" X I.D. of .221"
Our Standard Shim Pak Assortments are as follows;
2 Pak comes in .002"
4 Pak comes with 2 each .002" and .003"
6 Pak comes with 2 each .002", .003" and .004"
8 Pak comes with 2 each .002", .003", .004" and .005"
12 Pak comes with 4 each .002", .003", .004"
20 Pak comes with 4 each .002", .003". .004", .005" and .006"
24 Pak comes with 6 each .002", .003", .004" and .005"
30 Pak Gunsmith Special Assortment comes with 6 each .002", .003", .004", .005" and .006"
50 Pak Your Assortment
-OR- Choose ANY Pak and Specify Your Requested Thickness in Comment Box
Free Economy Shipping U.S.
👉Link To: ADD TRACKING and Guaranteed Delivery UPGRADE (USA Only)
Item # SRH/Yoke
Ruger Super Redhawk Revolver Yoke Shims
Also Fits: GP 100
Our Shims will fit the Ruger SRH and GP100 may fit other RDA models with a .342" Yoke Diameter
Other Models - Check Your Measurements Before Ordering
Yoke Shims Install on the Yoke at the Revolver Frame, and can compensate for wear, or adjust the cylinder slightly forward as needed when used with Cylinder Shims
No Instructions Included - Thinner Assortments Recommended
Made from USA Full Temper 300 Series Stainless Steel
Nominal O.D. of .424" X I.D. of .345"
Price includes Free Economy Mail U.S.
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TECH TIP: Review
Good Afternoon, Lance and Miss Tammy, The shims have arrived - thanks for the prompt shipping! I tinkered with installing them on a Ruger Single Six last evening. I have not shot the gun yet with the shims installed, but I started this project to begin with to correct a slight cylinder alignment issue at lockup. By manipulating the trigger and latching bolt shims, I was able to achieve perfect cylinder alignment. Since I had the hammer shims, I tinkered with the hammer, too. Man, what a difference in the "feel" of the operation of the gun! I know Rugers are built a little loose on purpose to allow for tolerances, but once I had everything tuned up, the gun felt solid with a very smooth cocking operation - just like a Linebaugh revolver I have (and at a lot less cost!). I'm sold on the benefits of these shims, and if I can I will use them on everything I work on from now on. I especially appreciate the fact that the shims are color-coded to keep from having to sort them out - that's a nice touch. Thanks again for a great product. Have a good day! R in VA
RDA~V001
TECH TIP VIDEO: Ruger Double Action Revolver Hammer Shim Installation
Shims will Smooth the Hammer Pull and Drop, Making a Lighter Hammer Spring More Reliable.
RDA~V002
TECH TIP VIDEO: Hammer and Hammer Dog Shim Installation: Ruger Super RedHawk Alaskan and Also Applies to: SP101, GP100, Redhawk, Super Redhawk
Shims will Smooth the Hammer Pull and Drop, Making a Lighter Hammer Spring More Reliable.
TECH TIP VIDEO: Ruger SP101 Double Action Revolver Shim Kit Installation ~ Also Applies to: GP100, Redhawk and Super Redhawk
In this video, I install a TriggerShims RDA Pak of Shims, and a Wolff 17113 Reduced Power Shooters Pak in a Ruger SP101. The Trigger Pull before was very tough in Double Action, with a inconsistent Single Action trigger pull weight of 5 pounds. After this install, the Double Action trigger pull was Much Better, and the Single Action Trigger Pull Dropped to a Very Smooth Consistent 3 1/2 Pounds! And the best part is there were no permanent alterations to this gun
RDA~TT004
TECH TIP: Ruger Double Action Trigger Job Guide
Step by Step Guide on Disassembly and Polishing
SP101 ~ GP100 ~ Super RedHawk / Alaskan and Redhawk Revolvers
Ruger Security-Six, Service-Six and Speed-Six
Kevin Wilson's Trigger Job Guide
Applies to all Large Frame Ruger
Double Action Revolvers
Clink on Photo Right to Open in New Tab
Lance - I Finished the Ruger SP101 Revolver Trigger Job today. Turned out Fantastic, over a 50% Reduction in Double and Single Action Trigger Pull. Replaced the Hammer Spring, Trigger Return Spring, Shimmed the Hammer and Trigger, and also polished the Hammer, Trigger, Sear, Dog and Pawl. This is an entirely new pistol. Thanks for the quick turnaround and shipping of the Hammer and Trigger shims. - Jim in PA
TECH TIP VIDEO: The Grandmaster's Guide to the GP100
Step by Step Guide on GP100 Revolvers
Jay Slater's In-depth GP100 2 hour Video Guide
These Ruger GP100 Techniques can be applied to all Large Frame Ruger
Double Action Revolvers
Click Here for Customer Reviews of the RDA Shim Kits
Hello Lance,
A few years ago I ordered a custom set of trigger and hammer shims for a Ruger GP-100. They installed easily and made a huge difference in the feel of the action. It feels like the gun's internals have been polished when it's just some inexpensive shims! I also installed a spring kit brining my investment to about $25, and it feels like I had a gunsmith do an action job! I'm very impressed with your products. I've sent hundreds of rounds down range since adding the shims and springs, and everything is still running great. I'll be purchasing an SP-101 in a few weeks, and will be measuring it for shims and springs as soon as I get it home.
Thanks again for producing such a great product.
-Aaron in Michigan
Ruger LCR/LCRX Revolver Trigger Shims
Fits Trigger in Ruger LCR Revolvers
.095" X .221" ~ Same Shim as our RedHawk Main Lever
Available Thicknesses .002" through .007"
Suggested Clearance .001" to .002"
Free Economy Mail U.S.
Ruger LCR/X Revolver Hammer Shims
Ruger LCP .380 Auto Hammer Shims
Fits Hammer in Ruger LCR-X Revolvers and the
Ruger LCP .380 Auto
.126" X .310"
Also Fits Ruger Mini-14 Hammer
Free Economy Mail U.S.
Hi Lance,
I have finally found time to install the Hammer Shims in my LCR-X. They fit perfectly and work smoothly. Thank you for a great product.
Lee in FL
Lance,
Just to let you know these shims that you sent me work just great for the Ruger LCP hammer.
Bill in MI
Wolff 184XX Gunsprings
Wolff Reduced Power
Ruger Double Action Hammer Springs
# 184XX Choose 10# - 11# - 12# Reduced Power Hammer Spring Fits - SP101, GP100, Super Redhawk, SRH Alaskan
*and some models of Security Six
NOTE:
*will not fit Redhawk - Use Kit 17108
*will not fit GP100 .22
Note: Not for 2011 and newer .22 Rimfire Models
Stock #18410 - 18411 - 18412
Wolff 184XX $15.00 Free Shipping w/ Tracking ~ USA Only
Our TriggerShims SP/GP/SRH/Alaskan
Ruger Double Action Hammer 3 Spring Pak
Kit # RDA-3HSP
This is Our Special Hammer Spring Pak
Note: Not for 2011 and newer .22 Rimfire Models
3 Hammer Spring Pak
Stock #RDA-3HSP - $17.95 Free Shipping w/ Tracking ~ USA Only
Ruger GP-100 Double Action
Reduced Power Shooters Pak
All Calibers (NOT .22)
This pak contains 1 each 9, 10 and 12 pound reduced power hammer springs for Ruger GP-100 series revolvers and 1 each 8 and 10 pound trigger return springs allowing adjustment for lighter and smoother trigger and hammer action
Note:
Factory Trigger Return Spring is 12 pounds
Factory Hammer Spring is 14 pounds
NOTE: *will not fit GP100 .22
Note: Not for 2011 and newer .22 Rimfire Models
Wolff 17110.....$18.95 Free Shipping ~ USA Only
Ruger SP-101 Double Action
Reduced Power Shooters Pak
This Pak Contains:
1 each 9, 10 and 12 pound Reduced Power Hammer Springs
and 1 (one) 8 pound Trigger Return Spring allowing adjustment for lighter and smoother trigger and hammer action.
Note:
Factory Trigger Return Spring is 10 pounds
Factory Hammer Spring is 14 pounds
*Important Note: .22 Caliber 2011 and newer:
Due to changes in this gun by the manufacturer,
this spring kit may not function in SP101 .22 caliber rimfire models
manufactured during and after 2011 ~ Use Kit Number 17114
For Your Reference, the 12# Hammer Spring in this kit measures 1.925"
and may be too short for 2011 and after .22 Caliber guns
Wolff 17113.....$18.95 Free Shipping ~ USA Only
Ruger SP-101 22 Caliber (2011 and newer) Double Action
Reduced Power Shooters Pak
This Pak Contains:
1 each 13, 14 and 15 pound Reduced Power Hammer Springs and
1 each 8 pound Trigger Return Spring
Allowing adjustment for lighter and smoother trigger and hammer action
For Ruger SP-101 .22 Caliber Revolvers produced since 2011
Note:
Factory Hammer Spring is 16 pounds
Factory Trigger Return Spring is 10 pounds.
Wolff 17114.....$18.95 Free Shipping ~ USA Only
Ruger Double Action Six Series
Reduced Power Spring Pak
Security Six, Speed Six and Service Six
Fits Security Six, Speed Six and Service Six
This Pak Contains:
1- 14 Pound Reduced Power Hammer Spring
1- Wolff Design Reduced Power Trigger Spring
Note(1):
Factory Hammer Spring is 16 pounds
Note(2): some late model Security Six Revolvers use GP100 Hammer Springs
Wolff 17106 ......$18.95 Free Shipping ~ USA Only
Testimonial: Hello Lance,
My spring kit arrived quickly and was easy to install, it made a definite improvement.
Thank You, Larry in IL
Ruger Redhawk Revolver
Reduced Power Hammer Spring Pak
Fits the Original Redhawk
This Pak Contains:
1 Each 12, 13 and 14 Pound Reduced Power Hammer Spring
Note:
The Hammer Spring also Functions as the Trigger Return Spring on this Gun
Wolff 17108....... $18.95 Free Shipping ~ USA Only
Ruger Super Redhawk and Alaskan Revolver
Reduced Power Shooter's Pak
This Pak Contains:
1 Each 9, 10 and 12 Pound Reduced Power Hammer Spring and
1 Each 10 and 12 Pound Trigger Return Spring
Note:
Factory Hammer Spring is 14 pounds and is 1.725" X .046" Wire
Wolff 9 Pound Hammer Spring is 1.840" X .041" wire
Wolff 12 Pound Hammer Spring is 2.00" X .042" wire
Wolff 17109........ $18.95 Free Shipping ~ USA Only
TECH TIP: Hammer Spring R&R Fixture
There are Several Ways to Accomplish Removing and Reinstalling the Hammer Spring, but I wanted to Show the Simplest Method Possible Here.
Take a Small Block of Wood, You Could Even Use Your Bench Top, Drill a 3/16 Diameter by 3/8 Deep Hole to Anchor Your Hammer Strut, Grasp the Spring Firmly with Your Fingers and Push Down to Relive the Tension and Remove the Pin.
A Thin Leather Glove Helps, as Does Working Quickly.
When Reinstalling The Cross Pin, I Found that on Your First Attempt if You Just Get the Pin Half Way, That Will Allow You to Get a Better Grip, Making Installing It the Rest of the Way Eaiser.
TECH TIP VIDEO: Ruger Double Action Revolver Disassembly
TECH TIP VIDEO: Ruger Double Action Revolver Reassembly
TECH TIP VIDEO: Ruger Double Action Revolver Cleaning
RUGER FACTORY TECH TIPS:
RedHawk Disassembly
and Reassembly
TECH TIP VIDEO: Redhawk Disassembly
TECH TIP VIDEO: Redhawk Reassembly
Review
Lance and Tammy,
My local gun shop ordered a Ruger SP101 for me and when it arrived I was shocked at the terrible trigger on the little gun. Besides having an over-weighted mainspring and trigger return spring, the action was rough and gritty.
I already had a 10# Wolff mainspring and an 8# trigger return spring. I replaced the factory springs and immediately noticed a trigger-pull improvement but the action was still rough and gritty. I decided to do the SP101 Trigger Job that was posted online by Kevin Wilson to smooth things up. After doing so, the action was smoother but It wasn’t as nice as it could be.
When looking at Kevin’s preliminary information he referred to installing hammer and trigger shims and listed your company as a source. I didn’t know if I wanted to go that far but after I had done all the sanding and polishing and re-springing the little revolver, I felt the trigger could still be better and shims could help.
Since I didn’t know the shim sizes needed, I ordered the #RDA-Pak GS-30 Piece set. They seemed to be shipped almost before I finished the order. (Your shipments are fast.) The #RDA-Pak GS-30 Piece set gave me plenty of thickness options (and plus possible spares for other guns).
Using the excellent video showing how to install both the trigger and hammer springs, I completed the installation in no time at all. I settled on .002 trigger shims and .008 hammer shims. The shims completed my trigger job. That final tweaking made a good trigger great. I feel the shims were the icing on the cake - no more rough and gritty action.
To test my efforts, I took the little revolver to the range and cranked off 50 rounds of Federal American Eagle 130g ammo without a single malfunction. It performed exactly how I wanted: smoothly and accurately. I was amazed that a small amount of financial investment along with a little time, effort and good instruction, turned good gun into a sweet shooter.
Thanks Lance and Tammy,
Sincerely, Bart in Kentucky
TECH TIP: Ejector Bit Tool
Cylinder Disassembly for Cylinder Shims
Brownells 080-000-362 RDA Screwdriver Set for Slotted Cylinder Screw
You can purchase the bit to fit slotted screws in Ruger Double Action Revolvers
at Brownells ~
Click for Brownells Ejector Tool
Customer Videos and Videos We Think You Will Find Helpful
Customer Videos and Videos We Think You Will Find Helpful
All Large Frame Ruger Double Action Revolvers (RDA's) SP101, GP100, Super Redhawk and to a lesser degree Redhawk, are basically the same except for size and some small details - Disassembly Techniques that are shown below on a specific model generally apply to all RDA's
You can find a Home-Made Tool Video here ~ Ejector & Center Pin Removal for the RDA
You can find RDA Disassembly Instructions here ~ Crane Cylinder Separation & Disassembly for the SRH
You can find RDA Cylinder Disassembly Instructions here ~ Cylinder Shim Disassembly for Shims
You can find RDA Cylinder Shim Installation Instructions here ~ Cylinder Shim Installation
You can find GP100 Cylinder Disassembly Instructions here ~ Ruger GP100 Cylinder Disassembly
You can find Customer SP101 Cylinder Shim Installation Instructions here ~ SP101 Cylinder Shim Installation
You can find further Disassembly and Tool info here ~ Ejector & Center Pin Removal for the RDA
If you glean some knowledge from these videos, leave the guy a nice comment, and say you found his videos at TriggerShims.com If you don't like his videos, remember what your Mother should have taught you... "If you don't have something nice to say son, don't say anything at all"
It is a good practice to use Dummy or Spent Cartridges to Support the Ejector Star Ratchet when loosening or tightening the Ejector Screw
Our USA Made Shim Stock holds a tolerance of less than 10% while most all calipers hold a measurement tolerance of Plus or Minus .001" and many round to the nearest .0005"
Burrs from the stamping process can influence the measurements slightly, but will have an insignificant effect in use, it is best to refer to the color coding when deciding what shim to use.
New Style Hex Screwdriver Bits
Some New Style Cylinders will need a special hex bit.
This Suggestion comes from Karl Ramm - Krammloxusa.com
Hi Lance, I made a little tool out of a hex security screw tip.
Drilled a 5/64" (.078") hole about 1/2"deep in a 1/8" Hex Security Screw Bit.
Heated the Cylinder Ejector Screw a little with a bic lighter for about 30 seconds
to loosen any Loctite.
Left handed thread turned with not much force. The screw came right out. See pics.
You will need a Carbide Drill Bit to drill the hardened Security Screw Driver Bit.
I can make these 1/8" Hex Security Screw Bits if anyone needs one, they can contact me at: 714-402-3980
Just so you know, the shims fixed the End Shake issue and the SP101 works perfectly. I was sent some shims from Power and they were the wrong ones. They said they were for the double actions GP, SP, RH & SRH. I knew they wouldn’t fit (had a feeling) and ordered from you. Your site showed specifically for the SP101 and are perfect. Thanks for the fast service.
~ Karl
TECH TIP VIDEO: Ammo Storage Tips
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~ Samuel Adams
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I will Ship Shims to USA, Canada and International
Gun Parts Shipped to USA Only
"American Made Gun Shims" - GunShims.com - TriggerShims.com
and
TriggerShims is a Trademark
of
Shively Sales
Michigan Center, Michigan
All Material Copyright of Lance Shively
2008 ~ 2025
God Bless and Make America Great Again!
BY PURCHASING SHIVELY SALES PRODUCTS
YOU ASSUME ALL RESPONSIBILITY FOR THEIR SAFE INSTALLATION AND USAGE.
YOU RETAIN ANY AND ALL RESPONSIBILITY FOR YOUR OWN ACTIONS. Be Safe!!
If you have any questions or safety concerns, see a qualified Gunsmith.
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Lance at Webmaster@TriggerShims.com
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