Surefire

Caliber: 5.56 mm (.223 caliber) - Length: 2.70 inches - 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 - Multiple bearing surfaces for superior suppressor alignment - 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 sound suppressors - Labyrinth seals prevent carbon buildup on suppressor lock ring indexing system - Installation requires no permanent modifications for M4 / M16 / AR15 type weapons