Surefire 5.56 Socom Muzzle Brake

The advanced SureFire SFMB-556-1/2-28 muzzle brake, which fits M4 / M16 weapons and variants with 1/2-28 muzzle threads, 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. Its patented Impulse Diffusion design minimizes side blast and rear-directed concussion effects. 
SureFire muzzle brakes are individually inspected for concentricity and alignment, and each is covered by SureFire’s No-Hassle Guarantee. 
Features:
Offset porting delivers greatly reduced recoil impulse and muzzle rise, so the weapon tracks straight back to keep you on target for faster shot-to-shot recovery
Precision machined from US mill-certified heat-treated stainless steel bar stock
High-precision single-point cut barrel threads for optimum thread interface
Inspected for all critical dimensions including concentricity and alignment
Pilot holes for tuning of muzzle brake and to pin-and-weld on short-barreled rifles
Black Ionbond DLC coating provides maximum protection against harsh environmental conditions and facilitates cleaning after extreme use
Serves as rock-solid mounting adapter for SureFire SOCOM Series accessories
Labyrinth seals prevent carbon buildup on lock ring indexing system
Installation requires no permanent modifications for M4 / M16 / AR15 type weapon