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TriggerShims
Ruger American Rifle Shims

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Shively Sales - Manufacturer of
TriggerShims Brand
Gun Shims
in
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American Made Ruger American Rifle Shims

Ruger American® Rimfire Rifle Bolt Shims
~ American Made ~

~ Including ~

Ruger American® Rimfire Long-Range Models

Fits all variations of the Ruger American

Fits all variations of the Ruger American ~ both .22 Caliber and .17 HMR

Click on Target for Installation Instructions ~ PDF Opens in New Tab

How do Bolt Shims work?

A two-piece bolt requires a precise fit to hold the cartridge rim closely against the breech without crushing it, allowing adjustment to custom-fit your rim thickness.

Installing our Bolt Shims between the two bolt halves eliminates excessive internal slop and rearward endplay. This creates a solid mechanical setup that prevents the bolt from backing away under impact, ensuring maximum firing pin energy transfer to eliminate misfires and light strikes while enhancing accuracy.

When the bolt action rifle's bolt locking surfaces become worn increases in the headspace can cause light firing pin strikes, poor ignition (misfires), looseness of the bolt, and loss of accuracy. Excessive headspace causes the bolt to feel loose.
Also Used for Adjusting after Re-Barreling

If you are getting misfires and light strikes or are chasing accuracy, shimming the bolt may be a good way to solve it.

Item# RARBS-V1

Made from USA Full Temper 300 Series Stainless Steel

Price includes Free Economy Shipping U.S.
International Customers Add Postage at Link Below

👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION

👉Link To: INTERNATIONAL TERMS / POSTAGE

👉Link To: Ruger American Rimfire Target Model Bolt Shim Test

Ruger Precision® Rimfire Rifle Bolt Shims

V3 - New for Fall 2025

Tired of flyers and light strikes on your Ruger Precision Rimfire?
Our V3 Bolt Shims dial in that rimfire headspace in seconds. Just slip one between the bolt halves, tweak for a snug fit, and watch groups tighten from dime-sized to touching at fifty yards.

Made by me here in the USA with precision stainless, they eliminate excessive headspace, boost reliable ignition, and give you match-level consistency without fancy tools. Easy install, satisfaction guaranteed 100 % - grab a pak and turn that rifle into the precision beast it was meant to be.

Item# RPRBS-V3

Price includes Free Economy Shipping U.S.
International Customers Add Postage at Link Below

👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION

👉Link To: INTERNATIONAL TERMS / POSTAGE

Hi Lance,
I put the new shim into the bolt and it is perfect, I shot the rifle yesterday and the shim is perfect. It fits exactly and does not catch anywhere. Thank you for all the help,
Ed in Texas

Customer IAN from New Zeland writes about his Ruger American® Rimfire Long-Range
Good Morning Lance and Tammy,
I have decided to write a small message to regarding my experiences with your shim kit. I had purchased a Ruger American .22 Long Range and to say the accuracy was poor was an understatement. Nothing I did helped much. I did the bedding, Action screw tension, the barrel crown, the trigger, one item at a time with extensive ammunition testing each time to find something it liked. My CZ’s even with ammunition they didn’t like still outshot it. Then I saw the Youtube video by Mr Revolver Guy from Day at the Range and thought ok, lets try the headspace and if that doesn’t work, I will sell it as it’s a dog. I followed the easy instructions and straight away the groups tightened and also it started accepting ammunition it had sprayed around the targets before, every group tightened. Like all 22LR it still has it’s preferences but all the groups are now touching at 50 yards. My thanks to you both, Regards Ian

A Thank You and Shout Out for these Videos by Copper Star Precision showing Ruger Precision Rifle Bolt Disassenbly and Polishing and Headspace Measurement and Ruger Precision Rifle Barrel Shim Installation using CZ XL Barrel Shims in his Headspacing video below.

Ruger Precision Rifle Barrel Shims

Ruger American Barrel Shims

Replacing the barrel on a Ruger American Rimfire is difficult because the factory barrel is press-fitted and pinned into the receiver rather than using a simple threaded/nut system like the centerfire models.
TriggerShims does not make Barrel Shims for the Ruger American Rimfire

Can you improve on this fine Rifle?
I think a set of TriggerShims Brand Shims can Certainly Help!!
But don't take my word for it, read this unsolicited Testimonial;

Lance,
Yet again I am a very impressed customer.
I was given a Ruger American Rimfire by my sons and wife for Father's Day 2 years ago and I just couldn't get the trigger "just right". Now, I had to keep this rifle because it was given to me as a gift - so I worked and worked on the trigger, polishing until the trigger and sear were mirrors - but still it was gritty and inconsistent.
Then, I stumbled across your kit and video and $15 and about 30 minutes later - I had the trigger I always wanted and knew the Ruger had hiding in there somewhere.
My Ruger had .015 slop / play, so I had to use two shims to get .013 and I put it together per your video instructions - and put the bolt in and closed my eyes and ..... FANTASTIC!
Gone is the grit and creep and the trigger is now consistent and I can't be happier.
Thank you for making such a great product at a fantastic price point.
I remain a loyal customer -
R.M. in PA

And Another;

I received the shims for my Ruger Precision Rifle and they worked great and very easy to install. I have had accuracy issues with this rifle from day one... in fact I have went so far as to replace the barrel and still wasn't happy with it. I decided to try shimming the bolt and that really helped accuracy and removed the flyers too.
I included photos of my 5 shot groups at 50 yards before and after, the results speak for themselves. ~ Thanks Dio in Michigan

Item # RAR/RPR Trigger Kit

Ruger American Rifle Trigger Shim Kit

~ Including ~

Rimfire and Centerfire Models

Ruger Precision® Rimfire and Centerfire Models

Ruger American® Rimfire Long-Range Models

Trigger Shim Kit for Ruger American Rifle Bolt Action Rifle

Fits All American Bolt Rifles both Centerfire and Rimfire

• TriggerShims Brand Trigger Shims fit Ruger American Rifle Triggers
  Remove side to side play in the Ruger Trigger Housing
• Not a one-size-fits-all solution, but a Custom Fit Choice of Thicknesses ~ .002" to .009"
• All TriggerShims Brand Shims are manufactured by me from USA 300 Series Hard Temper Stainless Steel
• Designed by me specifically for each application, shims won't show after installation into stock
• Ensures a Smooth & Wobble Free Trigger Pull ~ End Trigger to Frame Contact
• My 100% Satisfaction Guarantee
• Made in the USA by TriggerShims.com
• We are the Original Manufacturer of this Ruger American Rifle Shim
• For Installation Instructions - See my YouTube Videos below

Trigger Shims for Ruger American Rifles including Rimfire
8 Pak Kit Fits all Rifles

Fits All American Bolt Rifles both Centerfire and Rimfire

Standard Shim Kit includes 2 each of .002", .003", .004" and .005"
for a total of 8 Stainless Shim Washers
Includes a 1/8" Cheater Pin* (USA Only) to help installation

Kit Price Above Includes First Class Shipping w/ Tracking ~ USA ONLY
8 Pak Kit .........$17.00

*Cheater Pin included in KIT w/ Tracking ~ U.S. Orders Only
Shims-Only Kit for International Sold Below

Item # SS-RAR/T ~ .126" X .458"

Ruger American Rifle Trigger Shim Kit W/ Cheater Pin & Tracking

8 Pak w/ Cheater $17.00 USD

Copper Star Precision Installaton Video Link on the Ruger Precision Rifle so I wanted to pass it on Here: Copper Star Precision Ruger Precision Rimfire Trigger Job

Ruger American Rifle Trigger ~ Shims Only

SHIMS ONLY
NO Cheater Pin Included

Ruger American Rifle Trigger Shims ONLY - NO Pin KIT

Free Shipping U.S.A.

8 Pak Kit same as above less Cheater Pin but mailed in a flat White Envelope U.S. Economy Mail

Make Your Own Mix of Ruger American Rifle Trigger Shims

Please Include Desired Thicknesses when ordering or I will send Standard 8 Pak

Choose from .002" to .009" Thicknesses

Click Box to Choose Different Quantities

Ruger American Rifle Trigger Shim Kit

8 Pak $12.50 USD 12 Pak $18.00 USD 24 Pak $25.00 USD 30 Pak $29.00 USD 50 Pak Your Choice $45.00 USD 2 Shims $6.00 USD 4 Pak $9.00 USD

Shim Thickness Choice

Regular Assortment OTHER - Your Choice

Enter Choice / Request Below

👉Link To: INTERNATIONAL TERMS / POSTAGE

BOXRARSafety

Ruger American Rifle Safety Shims

~ Including ~

Ruger Precision® Rimfire Models

Ruger American® Rimfire Long-Range Models

~ New for 2022 ~

Fits All American Bolt Rifles both Centerfire and Rimfire

Trigger Latch Safety Shims

Fit Guaranteed or Your Money Back! Stops Safety Rubbing the Trigger Frame

Upgrade your Ruger American Rifle with Quality Shims from TriggerShims

A 6 Pak Assortment should easily do any one rifle

RAR Safety Shim is - .126" X .221"

Free Economy Shipping - First Class Mail and International

RAR Safety / Colt Diamondback - D Frame HAMMER Shim - 126X221

2 Pak $6.00 USD 4 Pak $9.00 USD 6 Pak $11.00 USD 8 Pak $12.50 USD 12 Pak $18.00 USD 20 Pak $22.00 USD 24 Pak $25.00 USD 30 Pak $29.00 USD 50 Pak $45.00 USD

Shim Thickness Choice:

Regular Assortment Your Choice

Enter Choice / Request Below

Photo Courtesy of Alan in CA

Bolt Shim Instructions

Bolt Shim Instructions

LANCE'S TECH TIP:
Rimfire Bolt Shim Installation
~ A General Guide ~

---

1. Understanding Rimfire Headspace

Unlike centerfire cartridges where headspace is measured from the shoulder, the .22 LR is rim-headspaced. The total dimension from the recessed bolt face to the barrel breech face determines how much "play" or clearance the cartridge rim has.

Rimmed cartridges utilize the thickness of the cartridge rim for head-spacing. A two-piece bolt requires a precise fit to hold the cartridge rim closely against the breech without crushing it. Installing our Bolt Shims between the two bolt halves eliminates excessive internal slop and rearward endplay, creating a solid mechanical setup that maximizes firing pin energy transfer to eliminate misfires and light strikes while enhancing accuracy.

Generally speaking, factory production rifles leave extra room between the bolt face and the breech to accommodate a wide variety of ammunition with varying rim thicknesses. You should first measure the depth of your bolt face pocket to ensure it meets SAAMI headspace minimum depth. Shimming between the two bolt halves ensures the bolt is seating the cartridge up gently against the breech with your chosen brand of ammunition.

2. How to Fit and Measure Your Shims

You can use our color-coded numbered shims like a gauge to find exactly when the bolt face touches the barrel breech face. From there, you can calculate your ideal bolt headspace depth based on your preferred ammunition's rim thickness.

• Fit by Feel: I cannot tell you which specific shim will work best with your rifle; you determine that yourself by fitting, feel, and live-fire testing.
• Measure in the Rifle: Installing Bolt Shims requires fitting by hand and checking with the bolt fully installed and locked down in the rifle action. Do not attempt to measure this with the bolt removed from the rifle.
• Use an Empty Chamber: To establish the proper bolt-to-breech fit, shims must always be fitted on a completely empty chamber.
• Extractor Tip: If possible, removing the extractors on some rifle models during the fitting process will give you a much better "feel" for the bolt face making contact.
• Finding the Stack: Start with a 4 or 5-pack of shims. Install the thinnest shim (.0015" or .002") and check how your bolt closes. If it closes normally, continue trying sequentially thicker shims (or stacking them if necessary) until the bolt handle begins to close harder than normal.
• Identifying the Slack: The exact point where your bolt begins to close hard indicates the total amount of mechanical slack that was present in your bolt layout.

3. Fine-Tuning the Fit

• Step Back One Number: Once you find the thickness that causes the bolt handle to close tight, remove that setup and step back by .001". For example, if a .005" Red Shim causes the bolt handle to close harder than normal, remove it and install a .004" Purple Shim.
• Avoid Undue Stress: If you have to force or put undue stress on your bolt to close it, you must reduce the shim thickness. Forcing the bolt closed puts premature wear on the shims and will not increase accuracy.
• Target Feel & Final Calculation: When you have the correct shim thickness installed, your bolt should close normally or just ever-so-slightly tighter than normal. At this point, you have successfully used the shims to tune the space available for your cartridge rim. By comparing your factory bolt pocket depth to your ammunition's rim thickness, you can determine exactly how much shim thickness to leave inside the bolt assembly to adjust your excess headspace.

  Example:

  • Your factory Bolt Pocket Depth measures a tight .038".
  • Your favorite ammunition has a Rim Thickness of .041" (meaning the cartridge rim is physically .003" thicker than the factory pocket depth).
  • By testing, you find it takes a .005" shim to completely eliminate internal slack and bring the bolt face up flush to the breech face.
  • Because you have a .038" bolt pocket and a .005" shim to touch the breech, backing up by just .002" leaves a .003" shim inside your bolt assembly to completely address your headspace issue.
  • Because of slight variations in rim thickness, it is better to be slightly loose rather than a slight crush, so trying the .003" shim and .002" shim for best fit is recommended in this example.
• Lubrication: For the longest shim life, apply a very small drop of oil or a tiny smear of grease to the shim before final installation.

4. Range Testing & Maintenance

Now you can go to the range. With the barrel pointed in a safe direction, check the fit with your favorite ammunition.

Due to natural variations in rim thickness across different ammunition brands, you may occasionally need to adjust your shim stack. Remember, you have already removed the excess mechanical headspace from the bolt assembly; your goal now is simply to fine-tune the clearance to find the "sweet spot" for your preferred cartridge rim thickness.

If you ever have safety questions or want to verify your dimensions, always use a dedicated rimfire headspace gauge to check your work.

Consistent chambering yields consistent results. Your satisfaction is guaranteed. If you feel you receive no benefit, you may send your shims back to TriggerShims for a full refund.

TriggerShims.com (Shively Sales)

Quality Gun Shims Made in the USA

TriggerShims Bolt Shim Instructions Copyright 2008 - 2026 V9-10/8/2026

Click Here for Printable PDF

Rimfire Rifle Bolt Shim Index

BoltShim-INDEX 9/24

Our Ever Expanding Selection of Rimfire Rifle Bolt Shims

Links to Our List of .22 Rifle Bolt and Barrel Shims

1. Anschutz 54 ~ Now In Stock!
   
2. Bergara B-14R Rimfire Bolt Shims
   
3. CZ and BRNO Rimfire Bolt Shims
   
4. CZ 457 Rimfire Bolt Shims
   
5. Holeshot 2500X Target Rifle Bolt Shims
   
6. Kimber 82G Target Rifle Bolt Shims
   
7. Lithgow LA 101 and SA 2020 Rimfire
   
8. Marlin 80 / 983 Rimfire Bolt Shims
   
9. Mossberg 44 U.S. Bolt
   
10. Mossberg 144 LSB Bolt
    
11. Remington 5 Bolt Shims
    
12. Remington 40X Bolt Shims
    
13. Remington 504T Bolt Shims
    
14. Remington 513T / 521T Rimfire Rifle
    
15. Remington 540X Bolt Shims
    
16. Ruger American Rimfire Bolt Shims
    
17. Ruger 77/17 77/22 Bolt Shims
    
18. Savage BMag Bolt Shims
    
19. Savage MKII Bolt Shims - Prototype
    
20. Springfield Armory Model 2020 Rimfire
    
21. Suhl 150 Rimfire Rifle
    
22. Tikka T1x and Sako P72 / M78 Rimfire Rifle / Walther KK300
    
23. Turbo V3 / Flash Turbo Bolt Shims
    
24. Walther KK500 Rimfire Bolt Shims
    
25. Winchester 43 and 52 Bolt Shims
    
26. Winchester 69 and 75 Bolt Shims
    

~ Barrel Shims ~

27. CZ 455/457 Barrel Shims
    
28. CZ 455/457 XL Barrel Shims
    
29. 10/22 Barrel Shims
    
30. 2500X and Trident Barrel Shims
    
31. 3/4" Shank Bull Barrel Shims
    

NOTE: email me to be put on a list to Request a New Bolt Shim ~ Send Lance an Email ~

Unsolicited Testimonial:
Just a friendly note on the bolt shims I purchased and installed. My 5 shot group went from dime size at 50 yds to everyone touching and not being able to count individual holes.
Thank You for a Great Product ~ Riley in WV

Unsolicited Testimonial:
Lance, I simply wanted to say thank you for providing Bolt Shims. My first one installed was on my Bergara B-14 22 Trainer. I won the club season matches in 2022. It's more accurate now than my winning season. After seeing an improvement, in an already accurate rifle, I've shimmed my Bergara Shooting Rimfire barreled action, two CZ 457, my 2020 Springfield, and my my 54 Annie. The Anschutz allowed for 5th place in the IR 50/50 factory class last year. I shimmed it yesterday. The common fliers were less frequent and overall consistency was improved. A noticeable improvement was seen in all the rifles.
Thanks again for offering a great product ~ Rob in NC

TECH TIP VIDEO: Ruger American Rimfire Rifle
Trigger Shims - Installation Instructions

TECH TIP VIDEO: Ruger American Rifle Trigger Pull Check

TECH TIP VIDEO: Ruger American Rifle .450 Bushmaster
Trigger Shim Installation

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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 ~ 2026

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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Republic.... I like the sound of the word. It means people can live free, talk free, go or come, buy or sell, be drunk or sober, however they choose. Some words give you a feeling. Republic is one of those words that makes me tight in the throat - the same tightness a man gets when his baby takes his first step or his first baby shaves and makes his first sound as a man. Some words can give you a feeling that makes your heart warm. Republic is one of those words. - John Wayne in the Alamo