Brownells Crush Washer for AR-15 1/2x28

Brownells Crush Washer Features The Brownells Crush Washer is machined from steel and sized for standard 1/2x28 threaded AR-15 barrels giving it a snug fit against the barrel shoulder before a muzzle device is torqued into place. As the muzzle device is tightened the washer compresses and deforms slightly taking up any rotational slack so the device lands and stays in the desired clocked position without loosening under recoil. This is a proven simple method used across the AR-15 platform for decades to properly index muzzle devices. The black finish resists corrosion and blends with the barrel and muzzle device finish. Because it is a wear item a crush washer is generally replaced any time a muzzle device is removed and reinstalled since a washer that has already been crushed once will not seal as reliably a second time. Keeping spares on hand makes it easy to swap muzzle devices for cleaning testing or upgrading without hunting down parts mid-project. This washer fits any standard AR-15 or M16 build using a 1/2x28 threaded barrel. It is an inexpensive essential part of any proper muzzle device installation. Brownells Crush Washer Specifications Brand: Brownells Compatible Hosts: AR-15 Material: Steel Color: Black Thread Pattern: 1/2x28 Available At: ARMSAGORA