SIG's Suppressed Upper Fits Any Standard AR | Guns & Gear S10
This video introduces SIG's SIR 300 Suppressed Upper Receiver, a solution for AR-15 owners seeking suppressed performance without multiple NFA tax stamps. The permanently attached suppressor ensures the barrel assembly exceeds 16 inches, requiring only one stamp. It's compatible with standard AR-15 lowers and offers significant sound reduction, particularly with subsonic ammunition, outperforming other suppressed platforms.












