Featuring a patented Impulse Diffusion design, the SureFire Muzzle Brake greatly reduces both recoil impulse and muzzle rise so that the weapon tracks straight back to keep you on target for faster shot-to-shot recovery, while minimizing side blast and rear-directed concussion effects. This advanced muzzle brake is precision machined from US mill-certified, heat-treated stainless steel bar stock (with high-precision single-point cut threads for optimum thread interface). The black Ionbond DLC coating provides maximum protection under harsh environmental conditions and facilitates cleaning. Blind pilot holes at the 3 and 9 o'clock position allow fine-tuning of recoil characteristics, while blind pilot holes at the 6 o'clock position enable indexing the adapter at bottom dead center, and pin-and-weld on short-barreled rifles. SureFire Muzzle Brakes are individually inspected for concentricity and alignment, and each is covered by the SureFire No-Hassle Guarantee.