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