Yankee Hill Barrel Shim Set 1/2" I.D. Md: Shim3102Set Barrel Shim Set To Be Used To Correctly Orient a timed Muzzle Device. This Set Is Used With Our 5.56mm Q.D. Muzzle Brakes. This Shim Kit Has An Inner Diameter Of 1/2"
Included With This Shim Kit Are shims With The following thicknesses : 2X 0.002"