The Sierra 5 is the ultimate 5.56 suppressor built for hard use. This isn't just another 5.56 silencer - the Sierra 5 delivers everything you demand from a dedicated rifle suppressor. We refuse to compromise on quality. Unlike some competitors, we don't cut corners with stainless steel baffles or sacrifice durability for weight savings. The Sierra 5 is full-auto rated with no barrel length restrictions, ready for any challenge you throw at it. Its distinctive knurling isn't just for looks; it's a functional design element perfectly aligned with the Sierra 5's mission. In fact, we encourage you to push the Sierra 5 to its limits - if you're not running it red hot, we might be offended! Engineered for professional use, the Sierra 5 achieves the ideal balance of sound and flash suppression while maintaining a compact size and minimal weight. Its HUB compatible (1.375-24") mounting system offers unparalleled versatility, allowing you to customize your setup with a variety of adapters. The Sierra 5 is available out-of-the-box with either our KeyMo or Xeno mounting system, providing immediate options for your specific needs. The Sierra 5's winning formula combines welded Cobalt 6 baffles within a durable stainless steel outer tube. This proven design ensures top-tier performance and exceptional longevity. The Sierra 5 is truly the last 5.56 suppressor you'll ever need. The Sierra 5 KeyMo package includes a 1/2-28 KeyMo flash hider and a KeyMo adapter for your convenience.