The Mossberg MMR Tactical is a mil-spec AR-15 from the shotgun-famous Connecticut maker. It features a 16-inch chrome-lined barrel, an Ergo Z-Float free-float handguard, and Magpul MOE furniture. Mossberg's entry into the AR-15 market. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 2011, USA Weight: 7.1 oz Overall length: 35.2" Status: Active Intended use: Home Defense, Patrol, Range