The ATI MIL Sport Rifle features an innovative lightweight design with metal reinforced polymer upper and lower receivers that save weight over traditional aluminum designs. Fitted with a 16 inch barrel and M4 Stock making it easy to handle and quick to get on target. It features a free floated 15 inch M-LOK rail for easy mounting of lights, lasers and other accessories, and the flat top receiver is ready for your optic of choice. The MIL Sport rifle providing the reliability you expect from ATI firearms.