Mossberg MMR (Modern Mossberg Rifle) Tactical — AR-15 variant from the shotgun-famous Mossberg. Direct impingement, 16-inch barrel, aluminum free-float handguard. Mossberg's entry into the AR-15 market; reliable budget-tier option. Type: Rifle Action: Gas-Operated Caliber: 5.56x45mm NATO Capacity: 10 Year introduced: 2012, USA Weight: 112 oz Overall length: 43" Status: Active Intended use: sport, self_defense