A Barrel Shim Set allows you to correctly orient a timed muzzle device at the specified torque. Two diameters options for 5.56 or 7.62 barrels or any other 1/2" or 5/8" thread.
The 1/2" (12.7 mm) set includes the following thicknesses:
The 5/8" (15.9 mm) set includes the following thicknesses: