The AR-15 Crush Washer is an essential component for proper muzzle device installation on rifles with 1/2 inch threading. This precision-engineered washer ensures optimal timing and secure attachment of flash hiders compensators and muzzle brakes.AR-15 Crush Washer for 1/2 inch threaded barrelsUPC: 785939517552Enables proper timing of muzzle devicesCreates secure gap-free installationEssential for flash hider and compensator mountingCritical for achieving proper muzzle device alignment and preventing gas leakage this crush washer is a must-have component for AR-15 builds and maintenance.