Fits Armalite AR-10 and DPMS LR-308 rifles with 5/8x24 threads. The muzzle brake ports greatly reduce recoil impulse and muzzle rise. Pilot holes are included for muzzle brake tuning and to pin-and-weld on short-barreled rifles. The compensator serves as a rock-solid mounting adapter for SureFire SOCOM series sound suppressors. Labyrinth seals prevent carbon buildup on the suppressor lock ring indexing system. A black Ionbond DLC coating provides maximum protection against harsh environmental conditions and facilitates cleaning after extreme use. Precision machined from US mill-certified heat-treated stainless steel bar stock. Installation requires no permanent modifications. MADE IN THE U.S.A.