DEAD AIR SIERRA-5 XENO 5.56 Sierra-5 Xeno 5.56 NATO The ultimate 5.56 suppressor Introducing the all-new 5.56 silencer from Dead Air Silencers. From the beginning, our mission has been to give No Quarter in design, performance, and technology. The Sierra-5 stands... MSRP: Was: Now: $859.99 Out of stock