The Precision Armament AccuWasher AW625 Gen2 Shim Kit (brand part no. A00502) is built for 1/2-28 threaded barrels that need the larger 0.825-inch bore clearance, giving shooters a way to clock a muzzle device precisely without cutting a crush washer. The kit uses thin, peelable shims stacked to whatever thickness is needed, so rotational timing can be dialed in gradually instead of guessed at with a single fixed washer. Precision Armament designed the AccuWasher line to complement its own muzzle brakes and compensators, and this larger-bore 1/2-28 version covers barrels and devices that fall outside the standard smaller-bore sizing.

Key Specifications

• Threaded for 1/2-28 barrels, paired with a larger bore for devices that need extra clearance.
• Sized with a 0.825-inch bore, matching it to the intended muzzle device and barrel diameter.
• Built as a Gen2 design, Precision Armament’s current-generation AccuWasher shim system.
• Uses peelable, stackable shims for fine, incremental rotational adjustment.
• Times a muzzle brake or compensator to correct rotational alignment without cutting a standard crush washer.

Frequently Asked Questions

What bore size is the AW625 1/2-28 version built for? It is sized with a 0.825-inch bore, larger than the standard 1/2-28 bore sizing.

Do I need to cut a crush washer with this kit? No, the stacked shims replace the need for cutting or grinding a crush washer.

Buy the Precision Armament AccuWasher AW625 Gen2 Shim Kit

Time a larger-bore 1/2-28 muzzle device correctly without trial-and-error washer cutting. Order the AccuWasher AW625 from Precision Armament in our gun parts category, shipped fast from our Lubbock, Texas gun shop.