Yankee Hill Machine 22/5.56 Thread Protector 1/2x28, Black Matte - YHM-3410-B

Steel thread protector designed to prevent damage to rifle barrel threads when a muzzle device is not installed. Compatible with .22 and 5.56 caliber rifles featuring 1/2x28 threaded barrels with .920 outer diameter. Simply screw onto the barrel threads for protection during storage and transport.