The AR-15 appearance is further enhanced with the addition of the SHOTFORCE Muzzle Mount. Simply slide over the shortened barrel and tighten. This will effectively cover the cut end of the barrel. The integral Weaver style base also provides a stable platform for mounting a flashlight or laser on the end of the barrel. Fits most 12 and 16 GA barrels with removable bead front sight. (.893 - .824 outside barrel diameter.) NOTE: 12GA barrels require a shim.