The SureFire SOCOM300-SPS suppressor is optimized for the .300BLK cartridge and is full-auto rated for both subsonic and supersonic ammunition. Additionally this .30-caliber suppressor is fully capable to be fired on .223 through .300WIN bolt-action rifles. This suppressor is one of the quietest options on the market with the utilization of SureFire’s patented V-baffle design. It is compatible with all 5.56, 6.8, or 7.62 SureFire SOCOM Suppressor Adapters and attaches with the same Fast-Attach technology as seen throughout the SOCOM Series of suppressors from SureFire. Caliber: 7.62mm (.308 caliber) Weight: 20.3oz (575g) Diameter: 1.5" (3.8cm) Length: Mfg: Surefire