Surefire

Caliber: 5.56 mm (.223 caliber) - Length: 2.67 inches - Patent-pending design provides greater than a 99% reduction in flash when compared to a plain muzzle - Multiple bearing surfaces provide superior suppressor alignment and prevent ringing of tines inside suppressor - Precision machined from US mill-certified heat-treated stainless steel bar stock - High-precision single-point cut barrel threads create optimum thread interface - Inspected for all critical dimensions including concentricity and alignment - 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 mitigate gas leak from suppressor lock ring - Installation requires no permanent modifications for M4 / M16 / AR15 type weapons