The Knight's Armament SR-30 is a suppressor-optimized short-barreled rifle built around the .300 Blackout cartridge. The 9.5-inch barrel with KAC suppressor provides hearing-safe fire with subsonic ammunition and still delivers useful terminal performance with supersonic loads. The SR-30 demonstrates KAC's engineering prowess in building a compact, reliable suppressed system from first principles. Type: Rifle Action: Semi-Automatic Caliber: .300 Blackout Capacity: 30 Year introduced: 2013, USA Weight: 112 oz Overall length: 28.5" Status: Active Intended use: Close-Quarters Battle / Special Operations