This is the closest you can get to the true New Zealand MARS-L rifle. This semi auto reference rifle includes true requirement features, such as: LMT metric flip-up sights, bayonet lug, Surefire Warcomp flash hider, enhanced trigger guard, QD receiver end plate, ambidextrous charging handle, MARS-L ambidextrous lower receiver. This is the latest and best version of a modern M4. LMT built this rifle with its patented Monolithic Rail Platform, the only true monolithic rail platform, milled from a single high-grade aluminum forging. Two locking bolts on the side of the receiver lock the barrel extension in place. MRP technology engages the barrel extension for a full 360 degrees and allows the barrel to be removed in seconds while minimizing point of impact shift. One receiver can support numerous barrels of varying length, material, and caliber.