Precision Armament A00500 AccuWasher Gen 2 Shim Kit 1/2×28

Description

Anyone who has fought a crush washer to get a muzzle brake clocked straight knows the frustration. The Precision Armament AccuWasher Gen 2 kit takes the guesswork out of the job. Instead of crushing a washer and hoping the ports line up, you pick a single precision-ground shim that gets your device timed and tight in one shot. This kit is built for 1/2×28 threaded barrels and features a .725" outside diameter for a clean, sleek fit against the barrel shoulder.

What Sets the AccuWasher Gen 2 Apart

Each shim is machined from 400-series stainless steel and lathe-turned on both faces to hold a guaranteed thickness uniformity of ±0.0001 inches. That level of consistency is what makes alignment repeatable, so your brake or comp sits exactly where it should every time. The stainless construction with a non-reflective oxide finish shrugs off corrosion and handles hard front and side impacts without deforming, which matters on a device that lives right at the muzzle. Each shim is chamfered on one side to clear barrels with a radiused thread shoulder.

Timing Made Simple With the AccuWasher Kit

The kit includes 18 individually marked shims that cover timing from 0 to 360 degrees in 20-degree increments. Every shim is laser-marked with its thickness and corresponding degrees of rotation, so you read the markings, choose the right one, and install it. No stacking thin shims, no tolerance stack-up, and no cranking down with excessive torque to force alignment. The single-shim approach also keeps your preload consistent.

This system works with any brand of muzzle device, whether you are mounting a muzzle brake, flash hider, compensator, or suppressor mount. The shims are reusable too, so a single kit will index roughly nine devices before you run low on options. For gunsmiths, builders, and anyone who wants their ports timed dead straight, it is a tool that pays for itself over a lot of builds.