The shoulder of the muzzle device extends over the barrel to cover the included crush washer and provide a uniform appearance. Wrench flats are incorporated for ease of installation.The ZEV Muzzle Device is only compatible with barrels that have a .750 or smaller gas block journal, due to the fact that the body of the muzzle device extends over the shoulder of the barrel.

• Provides flash suppression and muzzle rise reduction
• Crush Washer included