PRECISION ARMAMENT AR-15 1/2-28" ACCU-WASHER SYSTEM | Brownells
Muzzle Device - Accu-Washer® Timing Shim
Precision Armament - Installing your muzzle device doesn't have to be a guessing game of stacking multiple shims and worrying about under or over torquing. The Accu-Washer Alignment System gives you the