This 5.56 Armalite M15 Piston Rifle features a long-stroke piston system, 16" isonite QPQ treated chromoly barrel, flash hiding compensator, mil-std 1913 rail, 7075-T6 aluminum upper and lower receiver, two-stage trigger, Magpul STR adjustable stock, and an anodized finish. Includes one 30 round Magpul PMAG.