Providing shooters with a high quality scalable AR, Armalite's M-15 Defensive Sporting Rifle is everything you need. Light and strong at 6.1 lbs., the forged, flattop receiver with MIL-STD 1913 rail and 16 double-lapped, chrome-lined, chrome moly barrel combine to make a tough, dependable rifle that is easily accessorized to any configuration. The upper and lower receivers are forged from 7075-T6 aluminum with an anodized finish. This semi-automatic rifle is chambered in 5.56 NATO/223 Remington. It has a 6-position collapsible stock, 6 handguard, flash suppressor, and includes 30-round Magpul PMAG. This model has a railed gas block front sight base.