Caliber: 8.60 mm (.338 caliber) - Length: 2.xx inches - Delivers greatly reduced recoil impulse and muzzle rise and features neutral porting that loads bi-pod legs evenly - 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