Ultimate Arms Gear 4 Pack of Muzzle Brake Break Mits Covers Cap Guard Protects Bore Barrel from Rain, Water, Moisture, Snow, Dirt, Mud, Dust and All Terrain Weather Package of 4 Simply Roll the Cover Over the Muzzle Break for Protection. Color: Stealth Black. Will Fit Most Muzzle Break, Barrel Bore Ends. Protects Bore Barrel Against Rain, Water, Moisture, Snow, Dirt, Mud, Dust and All Terrain Weather.