The advanced SureFire SFMB-762-5/8-24 muzzle brake, which fits the AR-10, and 7.62 mm rifles with 5/8-24 muzzle threads, greatly reduces both recoil impulse and muzzle rise and features neutral porting that loads bi-pod legs evenly. Its patented Impulse Diffusion design minimizes side blast and rear-directed concussion effects. The SFMB-762-5/8-24 also serves as a rock-solid mounting adapter for SureFire SOCOM Series 7.62 mm Fast-Attach(R) suppressors. Precision machined from US mill-certified heat-treated stainless steel bar stock-including high-precision single-point cut threads for optimum thread interface-the SFMB-762-5/8-24 muzzle brake is given a black Ionbond DLC coating. When used in conjunction with a SOCOM Series suppressor, the patent-pending design of the SFMB-762-5/8-24 provides multiple bearing surfaces to ensure superior suppressor alignment. A rear labyrinth seal minimizes potential carbon buildup in the indexing. All SureFire SOCOM Series muzzle brakes have blind pilot holes at the 3 and 9 o'clock position to enable fine-tuning of recoil characteristics for individual shooting styles or ammunition characteristics. They also have blind pilot holes at the 6 o'clock position to enable indexing the adapter at bottom dead center, and to pin-and-weld on short-barreled rifles. SureFire muzzle brakes are individually inspected for concentricity and alignment, and each is covered by SureFire's No-Hassle Guarantee.