ATI’s Mil-Sport RIA P3P features a fully-patented metal reinforced polymer upper receiver along with a fully-patented metal reinforced polymer lower receiver. The lower has a patented hammer and trigger pin retainment system, preventing movement from the hammer and trigger pin during firing. The rifle also features patented over-molded metal inserts, which reinforce the buffer tube housing and rear takedown pin as well as reinforce the front takedown pins. The P3P also features a revolutionary Saf-T-First Nano Composite Parts Kit. This kit includes the hammer, trigger, disconnector, takedown pins, safety selector, magazine release and detents all made from nanocomposite material that is just as strong as metal components but at only 1/2 the weight.