The Omni Hybrid Maxx features a fully-patented metal reinforced polymer upper receiver along with a fully-patented metal reinforced polymer lower receiver. Additional patented features include a hammer and trigger pin retention system along with over-molded metal inserts to reinforce the takedown pin and buffer tube housings. The P4B also features a revolutionary Nano Composite Parts Kit. This kit includes the hammer, trigger, disconnector, takedown pins, safety selector, magazine release and detents all made from nano composite material that are just as strong as metal components but at only 1/2 the weight. This model is chambered in 5.56 and features an all-black color pattern and a blade-style brace. One 30-round magazine is included. These blemish models feature superficial cosmetic defects but are otherwise in perfect working condition. Blemished models are a great way to acquire like-new firearms at discounted prices. ATIM OMNI MAXX HYBRID AR-15 PISTOL WITH BRACE FEATURES: 10.5 BARREL 10 INCH M-LOK RAIL METAL REINFORCED POLYMER UPPER METAL REINFORCED POLMER LOWER 5.56 NATO/.223 REMINGTON BLADE STYLE BRACE