The SilencerCo Saker ASR 762 was designed for bolt action, semi-auto, and full-auto firearms. Design allows for maximum user adaptability and convenience. ASR (Active Spring Retention) Mount technology facilitates attachment via a variety of different flash hiders, muzzle brakes, and direct thread mounts. Stellite and stainless steel construction. Fully welded, multi-caliber, modular design.