This linear comp is for use on .223 / 5.56 caliber or smaller. PLEASE NOTE: SOME 9MM BARRELS HAVE 1/2X28 THREADS. DO NOT ATTACH THIS DEVICE TO A 9MM BARREL. WE RECOMMEND THAT ONLY A CERTIFIED GUNSMITH INSTALL THIS MUZZLE DEVICE ON A BARREL AND INSURE THAT THE BORE IS LARGE ENOUGH FOR THE INTENDED CALIBER.
I liked the product but i would have liked to talk to someone over the phone to make sure it was the right fit.
I wanted something simple until I could figure out which direction I wanted to go with my AR Pistol. Does what its suppose to. Good quality. Went on easy.