The Stag Arms Stag 9 is a 9mm AR-pattern rifle built on a dedicated blowback lower accepting Colt-pattern or Glock-pattern magazines depending on configuration. Type: Rifle Action: Semi-Automatic Caliber: 9mm Capacity: 32 Year introduced: 2019, USA Weight: 58 oz Overall length: 32" Status: Active Intended use: Home Defense, Competition