Gas operated semi automatic. Six position telescopic stock. Sixteen inch barrel with Melonite finish and 1 in 8 inch 5R rifling. 4140 steel barrel material. 7075 T6 aluminum receiver with hard coat black anodized finish. Folding Magpul MBUS front and rear sights. Ten inch, anti-twist, free floating rail. Chromed bolt carrier and gas key. Overall extended length 35 inches, collapsed length 32 inches.