AccuWasher® Gen2 Shim Adapter

The AccuWasher® Gen 2 is an upgraded version of the Precision Armament original single-shim muzzle device alignment system. It allows for precise, repeatable alignment of muzzle brakes, compensators, and suppressor mounts—eliminating the guesswork and inconsistency of peel washers and crush washers. Gen 2 features new shim sizes, thinner profiles, and adapter compatibility for broader use across different thread sizes and barrel profiles.

The Gen 2 system offers several improvements over the original:

The shim adapter serves three key functions:

• Expands compatibility - Allows use of the AccuWasher system on multiple thread sizes and barrel profiles that were previously unsupported.
• Improves fit and finish - Enables shooters to size up to achieve a cleaner visual transition between the muzzle device and barrel shoulder.
• Adds modularity - Makes the Gen 2 system future-proof and more versatile for both OEMs and end-users.

Note: If included in your kit, the adapter should be installed before the indexing shim.

Yes. The new shim adapters are backwards compatible with the original system. This means current Accu-Washer users can upgrade their setup without replacing their entire kit.

Yes. Shim adapters are available in both 1-pack and 3-pack options and can be purchased separately through our website or authorized dealers.

We've created an easy-to-follow and detailed instruction manual with a printable timing chart. If you have questions, feel free to contact our service team:

Phone: 585-593-4975

Email: sales@precisionarmament.com