Luth-AR 308-BL06CW .308/7.62x51mm Crush Washer 5/8x24 Steel

The Luth-AR 308-BL06CW is a steel crush washer designed to properly index muzzle devices on 308 Winchester and 7.62x51mm NATO AR-10 pattern barrels. The washer is machined with a 5/8x24 thread pattern to match the standard threading found on .308-caliber AR-10 barrels and the muzzle devices that mount to them.

A crush washer is installed between the barrel shoulder and a muzzle device such as a flash hider, compensator, or muzzle brake. As the device is tightened against the washer, the washer compresses slightly, allowing the user to time the orientation of the device so that ports, prongs, or holes are aligned correctly relative to the bore. The result is a clean, professional look while ensuring the device is properly indexed and solidly secured to the barrel.

Built from steel for durability under repeated install and removal, this .308 crush washer is a small but essential part of any AR-10 build or muzzle device swap. It is sized specifically for the 5/8x24 thread specification common to 308 AR-10 platforms.