The M-15(TM) DEF15 is legendary Armalite quality in a streamlined platform. The Defensive Sporting Rifle is a high-quality"" no-frills rifle well suited for duty"" sport"" or defense. It weighs in at 6.1lbs"" has a forged"" flat-top receiver with MIL-STD 1913 rail and features a gas block with a MIL-STD 1913 rail to easily attach accessories.