Don’t smoke your nice lights. Originally designed for the Kriss submachine guns, these extensions have proven popular with a lot of our clients. Threaded M16X1LH internally and externally, these barrel extensions go onto your M16X1LH threaded muzzle, keeping muzzle blast away from lights and providing clearance for silencers, flash hiders and other muzzle accessories. Crafted from stainless billet with a black oxide finish, these extensions index on the muzzle of the firearm. Adds 2” length.