ATI Omni Hybrid Maxx AR-15 pistol in Black, 10.5\" barrel, and 9\" M-Lok rail. Pistol features a fully-patented metal reinforced polymer upper receiver along with a fully-patented metal reinforced polymer lower receiver. Chambered in .300 AAC Blackout caliber. Comes with a factory installed blade style pistol brace, flip-up sights and a 30rd magazine. The ATI Omni Hybrid MAXX pistol features an innovative lightweight design with metal reinforced polymer upper and lower receivers that save weight over traditional aluminum designs. Fitted with a 10.5 inch barrel and blade stabilizing arm brace this compact AR style pistol is easy to handle and quick to get on target. It features a 9 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. Short and maneuverable while still providing the reliability you expect from ATI firearms this AR pistol is a great value, with features usually only found on firearms double the cost. Ships complete with one 30 round magazine.