Constructed of stainless steel and Inconel, the SOCOM300 SPS suppressor is designed to withstand full-time full-auto use, so don't be afraid to put it through the paces. At just 7.9" in length, you won't sacrifice size or maneuverability for performance when using this suppressor on your carbines, SBRs, or braced pistols. Optimized for use with carbines that have barrels that are 10" or less, the SOCOM300 SPS delivers unprecedented sound suppression with both subsonic and supersonic .300BLK rounds. It's also incredibly effective with 5.56, .308, and .300WM rounds, too. The SOCOM300 SPS's baffles are specifically designed and optimized for subsonic ammunition, and the oversized yet precision machined bore diameter decreases the baffle strike probability from unstable projectiles. All silencers require the purchase of a $200 Federal Tax Stamp.