Brownells AR-15 Master Shim Set

The Brownells AR-15 Master Shim Set is a comprehensive collection of shims designed for precise fitting and alignment of AR-15 components during gunsmithing and assembly. Includes a variety of shim sizes to accommodate front sight bases, gas blocks, barrel nuts, and other key interfaces. Ideal for eliminating play, correcting alignment, and achieving proper torque specifications on AR-15 platform builds and repairs. A must-have for any AR-15 armorer or gunsmith.