Rock River Arms .223 Beast Muzzle Brake Black. 223 Beast Muzzle Brake was created in order to be the ideally suited item for anyone looking for an outstanding selection.. Developed using some of the most extremely strong and long lasting materials available these Muzzle Brakes & Compensators from Rock River Arms will present you with an item which gives you numerous years of reliability. Rock River Arms has been developing top quality products for a very long time and the Rock River Arms .223 Beast Muzzle Brake is their way of revealing just how much they are concerned. Here at OpticsPlanet we ensure that it is our responsibility to obtain the best solution for all of your needs and presenting the Rock River Arms .223 Beast Muzzle Brake is one thing that we're delighted to offer. Specifications for Rock River Arms .223 Beast Muzzle Brake: Manufacturer: Rock River Arms Color: Black Projectile Caliber: .223 Caliber Threads per Inch: 1/2x28 Length: 3.15 in Weight: 4.7 oz Package Contents: Rock River Arms .223 Beast Muzzle Brake Rock River Arms AR0117B: .223 Beast Muzzle Brake Black