LWRC's IC-SPR is constructed using the highest quality materials.It built on a patented self-regulating short-stroke gas piston system.The one-piece monoforge upper design includes an integrated rail-base, while the full 12 modular rails available on the sides and bottom of the hand guards.Its dual control fully ambidextrous lower receiver includes bolt catch and release, magazine release and fire control access from both sides.The cold hammer-forged barrel is nicorr treated and spiral fluted, while the nickel-boron coated bolt carrier delivers unparalleled wear resistance, corrosion resistance and permanent lubricity.