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Walther Shims

Item # WKK500/BS

Walther KK500 Rimfire Bolt Shims

Walther KK500 Model Small-Bore Target Rifle Bolt Shims

The Walther KK500 Model Small-Bore Target Rifle chambered for the .22 Caliber Long Rifle Cartridge

Bolt Shims for Walther KK500 Target Rifles

Also may fit other models, check your bolt size to confirm
Bolt Shim ~ .480" X .751"

Note: Walther KK300 Rifles cross to Tikka T1X Shims

Currently Walther (Factory?) Shims I have been told come in these thicknesses:

• 1.52mm = .0598"
• 1.53mm = .0602"
• 1.54mm = .0606"
• 1.55mm = .0610"
• 1.56mm = .0614"

With our kit, you can adjust the full range of sizes in increments of .0005 by stacking shims -

Adjust by stacking with your current shims, or make a complete stack to adjust under your current thickness

These are the Original TriggerShims Brand Walther KK500 Bolt Shim Pak

Does the guy your shooting against use our bolt shims?

Includes Free U.S. Postage

Item # WKK500/BS Bolt Shim Pak ~ .480" X .751"

Click Box to Choose Different Quantities

Walther KK500 Rimfire Bolt Shim Pak 480 X 751

14 Pak Assortment $38.50 USD 4 Pak Assortment $11.00 USD 5 Pak Assortment $14.00 USD 2 Pak Any Shim $7.50 USD

Choose Assortment Shim Pak

Our Standard Assortment Other - Your Choice

Enter Choice / Request Below

👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION

👉Link To: INTERNATIONAL TERMS / POSTAGE

Special Thanks to Field Tester Javier in Spain

Item # WKKM-KKJ/BS

Walther KKM and KKJ Rimfire Bolt Shims

Walther KKM and KKJ Model Small-Bore Target Rifle Bolt Shims

These Shims for the the Walther KKM and KKJ Model Small-Bore Target Rifle chambered for the .22 Caliber Long Rifle Cartridge
Also Fits KKJ .22 WMR

These are New 2026 Tighter ID Bolt Shims for Walther KKM and KKJ Target Rifles designed for the .620" Bolts with variations.

Also may fit other models, check your bolt size to confirm
Bolt Shim ~ .622" X .751"

NOTE: Make Sure to Read Article Below about KKM Rifles Bolt Cocking Detent by Gunsmith Ray Hamell before ordering

Includes Free U.S. Postage - White Envelope

Item # WKKM-KKJ/BS Bolt Shim Pak ~ .622" X .751"

Click Box to Choose Different Quantities

Walther Item # WKKM-KKJ/BS 622X751

5 Pak Assortment $14.00 USD 4 Pak Assortment $11.00 USD 2X4 Pak Assortment $20.00 USD 2X5 Pak Assortment $25.00 USD 3X4 Pak Assortment $28.00 USD 3X5 Pak Assortment $35.00 USD 50 Pak Any Bolt Shim $90.00 USD 2 Pak Any Shim $7.50 USD

Choose Assortment Shim Pak

Our Standard Assortment Other - Your Choice

Enter Choice / Request Below

👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION

👉Link To: INTERNATIONAL TERMS / POSTAGE

TECH TIP REVIEW:
KKM Rifles Bolt Shim Damaged by Cocking Detent ~ Gunsmith Ray Hamell

Tech Tip for KKM Rifles by Gunsmith Ray Hamell - Shim Damaged by Cocking Detent;

The problem here is that the cocking detention is shearing the shim when closing the bolt while chambering a round. Simply removing the bolt detent and spring should do the Trick. Its only function is to maintain the bolt face/ handle alignment when the bolt is removed from the rifle. I have done this on all the Walthers I’ve built and the only downside is that occasionally the two halves become unintentionally misaligned while the bolt is out of the rifle and have to be manually timed to re-insert the bolt. No functional downside as long as the bolt is in the rifle. The second picture clearly shows the cocking detent. Placing a “witness” mark centered over the detent before removal will make visual realignment a breeze when reassembling the bolt or in the event the two halves become misaligned while the bolt is removed for cleaning or storage. I recommend a stiff bolt grease rather than oil on the shims, as that helps maintain alignment and helps prevent dust and other debris from collecting between the bolt halves.

Item # SS-WKK300/BS

Walther KK300
Tikka T1x Rimfire Rifle
Sako Tikka T1x Rimfire Rifle
Sako P72 Rimfire Rifle
Sako M78 Rimfire Rifle
Walther KK300
Weihrauch HW66 Rimfire Rifle
Bolt Shims

T1x Bolt Shims .555" X .670"

Now In Stock - Known to fit:
Walther KK300
Tikka T1x Rimfire Rifle
Sako Tikka T1x Rimfire Rifle
Sako P72 Rimfire Rifle
Sako M78 Rimfire Rifle
Weihrauch HW66 Rimfire Rifle

How does a Rimfire Bolt Shim work? The actual head space is in the recessed face of the bolt. Shimming between the two bolt halves ensures the bolt is up snug against the breech. If the bolt has excessive clearance at the breech it can to cause misfires and light strikes, or simply inconsistent accuracy. When a Production Rifle is assembled, a bit of extra room or excess tolerance can be left, and this slight variable can affect 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.

Factory fitting of the barrel into the receiver can also leave excess clearance between the bolt and breech. Shims can also used for adjusting after Re-Barreling If you are getting misfires and light strikes shimming the bolt may be a good way to solve it.

These are the Original TriggerShims Brand Tikka T1x Rifle Bolt Shims
A 4 Pak or 5 Pak should do most any gun, Order multiple Paks for Multiple Guns and Save $$

TriggerShims was asked by Elijah, an Ohio Shooter and Mark, a UK Shooter to make shims for this bolt, and we have listened.
Used as a measuring device and an adjustment tool if needed, shims are installed until the Bolt just touches the barrel face, and then reduce by .001"
Also used to Adjust to Varying Rim Thicknesses for your Favority Match Target Ammo

Sold in paks of 4 or 5 to check and adjust bolt to barrel fit.

T1x Bolt Shims .555" X .670"

FITS: Walther KK300
Tikka T1x Rimfire Rifle
Sako Tikka T1x Rimfire Rifle
Sako P72 Rimfire Rifle
Sako M78 Rimfire Rifle
Walther KK300
Weihrauch HW66 Rimfire Rifle

Item # SS-T1X/BS Bolt Shim Pak

Click Box to Choose Different Quantities

Includes Free U.S. Postage

Tikka T1x Bolt Shim Pak 555 X 670

5 Pak Assortment $14.00 USD 4 Pak Assortment $11.00 USD 2X4 Pak Assorted $20.00 USD 2X5 Pak Assorted $25.00 USD 3X4 Pak Assortment $28.00 USD 3X5 Pak Assortment $35.00 USD 50 Pak Any Bolt Shim $90.00 USD 2 Pak Any Shim $7.50 USD

Choose Assortment Shim Pak

Our Standard Assortment Other - Your Choice

Enter Choice / Request Below

👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION

👉Link To: INTERNATIONAL TERMS / POSTAGE

Item # 120X190

Walther PPK/s .22 (Umarex) Trigger Shims

Walther PPK/s
.120" X .190" Trigger Shim

Walther PPK/s .22 (Umarex)
These Shims fit Trigger Pins on Walther PPK/s .22 (Umarex)
and helps to produce a smoother trigger pull

Same as Colt Python - E/I Frame TRIGGER Shims .120" X .190"

Trigger 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"
-OR-
Choose ANY Pak and Specify Your Requested Thickness in Comment Box
Available in Stainless Steel ~ .002" - .009" Thickness

Includes Free U.S. Postage

Colt Python and Walther - E/I Frame TRIGGER Shims 120X190

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

Item # W-KK500 TECH TIP V1

Walther KK500 Headspacing

TECH TIP V1

1. What Is Headspace? (The Basics)

Headspace is the precise distance between the bolt face and the chamber surface that stops the cartridge. In .22 LR rimfire rifles like the Walther KK500, this is controlled by the rim thickness of the cartridge.

Proper headspace ensures:

• Reliable firing pin impact (no light strikes)
• Consistent ignition and accuracy
• Safe pressure containment

2. Factory Shims in the Walther KK500

Walther uses precision shims (thin metal washers) inside the bolt during assembly to set initial headspace. These are placed between the bolt handle and bolt body to control how far forward the bolt face sits when locked.

Typical factory shim thickness: 1.52mm to 1.56mm (≈0.060")

3. Why Adjust for Different Ammo?

Not all .22 LR ammo has the same rim thickness:

• Bulk/plinking ammo: ~0.038"–0.040" (thinner)
• Match-grade (Eley, Lapua): ~0.041"–0.043" (thicker, more consistent)

Switching ammo without adjusting headspace can cause:

• Light strikes (too loose)
• Hard bolt closure or misfeeds (too tight)
• Reduced accuracy and reliability

4. How Shims Work

Shims act as spacers:

• Add shims → Bolt face moves forward → Tighter headspace
• Remove shims → Bolt face moves back → Looser headspace

Installation Steps:

1. Disassemble bolt (remove handle)
2. Stack shims on bolt stem (light grease recommended)
3. Reassemble and test with headspace gauges
4. Target: Bolt closes freely on a gauge 0.001" thicker than your ammo’s average rim (~0.001"–0.003" crush)

5. Official Walther Position

Walther does not publish a public headspace specification for the KK500. Factory setup uses selected shims to ensure reliable function with standard SAAMI .22 LR rim dimensions (0.036"–0.043").

Adjustments are intended for authorized service centers using proprietary gauges.

6. Practical Recommendation

Step	Action
1	Measure 10 rounds of your ammo with a micrometer (rim thickness)
2	Use headspace gauges (e.g., 0.040", 0.042", 0.043", 0.044")
3	Set headspace so bolt closes freely on a gauge 0.001" thicker than average rim
4	Result: ~0.001"–0.003" crush → optimal ignition & accuracy

Best Practice (per top tuners): “The bolt should close with a soft 'click' — not slam, not drag.”

7. TriggerShims Headspace Adjustment Kit

Aftermarket solution for fine-tuning or replacing worn factory shims.

• Stainless steel shims: 0.480" ID x 0.751" OD
• Thickness steps: 0.0005" increments
• Kits: 4-pak ($11) to 14-pak ($38.50)
• Ideal for matching headspace to specific ammo lots

8. Bottom Line

• “0.002"–0.004" crush” = practical field rule from competitive shooters, not Walther factory spec.
• Source: Rimfire Central, benchrest tuner logs, TriggerShims customer guides.
• Safe? Yes — when done with gauges and testing.
• Required? No — factory setting works fine for most.
• Worth it? Yes — if you're chasing 0.1" groups at 50m.

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Technical content for educational use. Always consult a qualified gunsmith for safety-critical adjustments.

V1 - 10/27/2025

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