LWRC's IC-SPR variant is constructed using the highest quality materials. The SPR is built on a patented self-regulating short-stroke gas piston system, machined from materials that belong to the super alloy family of steel alloys most often used in aerospace. Its gas-piston system can be accessed quickly by loosening two thumb screws. Other features included a one-piece Monoforge upper design that has an integrated rail-base that is stronger and lighter. The 12 inch user configurable rail system with individual rail sections allow the shooter to place accessory rails where they are needed while maintaining its low profile ergonomic fit and function. Its dual control fully ambidextrous lower receiver includes bolt catch and release, magazine release and fire control access from both sides of the IC-SPR. Included is an manufactured- NiCorr treated cold hammer forged spiral fluted barrel that has increased surface area which reduces heat speeds up cooling. The Nickel-boron coated bolt carrier delivers unparalleled wear resistance, corrosion resistance and permanent lubricity. The LWRCI IC-SPR comes complete with Skirmish back up iron sights, ambidextrous charging handle, adjustable compact stock and a Magpul MOE+ Grip and LWRCI High Efficiency 4-Prong Flash Hider.