Primary Weapons AR-308 .308 Shim Kit

Hardened steel shims ensure precise fit and correct alignment of flash suppressors, muzzle brakes, and compensators. Large (thick) shim allows 90Adeg of rotation and can be used as a spacer for barrels not having a relief cut behind the threads. Medium shims add approximately 45Adeg of rotation. Small shims used with large and medium shims provide smaller degrees of rotation for finely-tuned, critical alignment. Mfg: Primary Weapons