Rock River Arms Operator Muzzle Brake Lar-8 Black. . Developed by using some of the very most strong and dependable materials around these Muzzle Brakes & Compensators by Rock River Arms will provide you with something that will give a great deal of consistency. Rock River Arms has been making high quality products for a very long time and the Rock River Arms Operator Muzzle Brake Lar-8 is their means of demonstrating how much they care. Right here at OpticsPlanet we ensure that it is our obligation to purchase the best product for all your needs and exhibiting the Rock River Arms Operator Muzzle Brake Lar-8 is one thing that we are delighted to offer. Specifications for Rock River Arms Operator Muzzle Brake Lar-8: Manufacturer: Rock River Arms Color: Black Projectile Caliber: .277 Caliber Threads per Inch: 5/8x24 Length: 2.575 in Weight: 3.8 oz Package Contents: Rock River Arms Operator Muzzle Brake Lar-8 Rock River Arms 308A0117OP: Operator Muzzle Brake Lar-8 Black