Product Description TacFire's Thread Crown muzzle break is constructed of steel and made in the USA. This 308 model has 5/8"x24 tpi and a black oxide finish. TacFire MZ10213B Thread Crown Muzzle Brake Black Oxide Steel with 5/8"-24 tpi Threads & 2.05" OAL for 308 Win AR-10 at United States Association of Gun Owners Browse all United States Association of Gun Owners deals $15.83 In Stock at United States Association of Gun Owners Price verified 2d ago Buy Now at United States Association of Gun Owners Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand United States Association of Gun Owners United States Association of Gun Owners