This S&W M&P 15 Sport I, II, & III stock upgrade is built to perfectly fit Ruger AR-556, Colt, Bushmaster, PSA, and standard AR-15 / M4 carbines. This aftermarket S&W M&P 15 Sport 1-2-III stock upgrade is an AR 15 M4 6-position mil spec buttstock with a recoil-reducing butt pad and QD sling swivel. The M4 mil spec butt stock is a 6 position collapsible stock it will fit any AR 15 or Smith & Wesson M&P 15 Sport equipped with a standard mil-spec carbine buffer tube. Fits: AR10, AR15, M4, M16, with Mil-Spec sized carbine receiver extension tubes Only! such as Colt, Armalite, S&W M&P 15 Sport, LMT, Bushmaster XM15 556, Ruger® AR-556® and others. Compatible with left and right handed users. Check with the manufacturer of your model AR for compatibility if you are unsure of your buffer tube diameter.
