This 3-port muzzle brake is compatible with all SilencerCo ASR Mounts and with multiple thread and caliber options, you can shoot suppressed for any demand. It offers quick and easy one-hand-on, one-hand-off attachment and detachment. The ASR mounting system comes standard with the Omega 300, Chimera 300, Saker ASR and Specwar families. Its also compatible with Hybrid 46, Harvester Series, Octane Series, and Omega K Series. See the size chart below to find the correct ASR Mount for your silencer.