This proven design greatly reduces recoil and muzzle rise, providing a faster follow up shot. Made from quality heat treated steel and plated with a matte black finish. Threaded 5/8"-24, this muzzle brake will work on any .30 Caliber model. Designed to allow easy installation and removal of the .308 sound suppressor. Includes necessary shim kit. Kit includes 5x 0.005", 2x 0.002", and 1x 0.020".