AT3(TM) 1/2 Inch Crush Washer for .223/5.56 Muzzle Devices Compatible with AR-15

Time Your Muzzle Device with a Black Nitride Crush Washer from AT3 Crush washers are essential to replace after removing for replacing a muzzle device. Re-using crush washers can lead to muzzle devices spinning off or becoming misaligned. AT3 offers high quality, machined crush washers finished with black nitride that will match most new barrels [...]