AR-15 Muzzlebrake with Holes - 5.5 Inch Steel Mil-Spec - Guntec USA
5.5" long AR15 Muzzle Brake with 1/2 x 28" threads. Made of heat treated steel. Mil-Spec. You can permanently attach by pin and then weld or silver solder to a 10.5" barrel to make legal non-NFA. Made in the USA.