LWRC M6-SPR MOD. 0, 5.56mm cal. auto rifle. Serial #35-05577. New in box. 14.5" spiral fluted barrel with a pinned flashider brings the barrel length to 17". State of the art piston design and the absolute best of everything - top of the line carbine. Mag pul grip and stock. 11" aluminum free float forearm with attachment points - much more ergonomic and thinner than regular rails. Ambi -single point sling mounts and charging handle. This is the most impressive carbine I have handled. Everything is so well thought out with superior design and function. Includes box, magazine and paperwork. A top of the line carbine.