The mid-Length system of this M&P15 carbine results in lower recoil and better accuracy, providing higher second shot hit probability. It has a 16" 5-groove barrel with a 1:8" twist, S&W enhanced flash hider, chromed-lined bolt carrier and gas key. This model features a free-floating VTAC/Troy 13" Extreme TRX Hand Guard with two 2" adjustable picatinny-style rails for improved shooting ergonomics, reduced heat transfer. It is extremely light weight and rigid for quicker target acquisition.