Smith & Wesson 5.45x39 M&P 15R M4 Upper
Not for sale with magazine in CA, MA, MD, NJ & NY.
New Smith & Wesson 5.45x39 M&P 15R M4 16" Complete (yes that means bolt and carrier assembly as well) Upper Half for AR15/M16 style Rifles. Features a 1:8 twist 4140 Steel 16" Chrome lined barrel and T-Marked 7075 T6 Aluminum flat top receiver. Includes 30rd C-Products 5.45x39 Aluminum magazine with No-Tilt follower, and Heavy Hammer spring. Upper as pictured.