Crush Washer 1/2-28

Crush Washer 1/2-28 Description

This Crush Washer fits all 1/2×28 sized AR-15 barrels. This single use crush washer is not threaded and is used to fasten a muzzle brake. To install, slide the washer onto the barrel followed by the muzzle device. Then tighten your muzzle device and crush the washer to fasten it into position. This crush washer is a high quality standard Mil-spec part for any AR-15 barrel.