This brand new SCR® model features a modern, high-impact polymer buttstock with enhanced ergonomics combined with a free-floating FightLite® M-Lok handguard for maximum accessory retention. Equipped with a MIL-STD 1913 flat top upper receiver that accepts most modern optics, night vision and thermal devices; the SCR® is designed to perform under the most demanding field, competitive shooting and tactical conditions. Its multi-caliber, modular arrangement permits users to instantly change calibers in the field by simply pressing two pins and exchanging one upper receiver assembly for another. Rugged, lightweight and accurate the FightLite SCR® accepts most AR-15 parts and accessories including magazines, upper receivers, barrels, bolts, handguards, sights and optics.