Description Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO. The American Tactical Inc. OMNI Maxx P4 Pistol features a fully-patented metal reinforced polymer upper receiver along with a fully-patented metal reinforced polymer lower receiver. The Omni Hybrid lower features a patented hammer and trigger pin retainment system, preventing movement from the hammer and trigger pin during firing. The Omni Hybrid also features ATI’s patented over-molded metal inserts, which reinforce the buffer tube housing and rear takedown pin as well as reinforce the front take down pins. This allows for metal-on-metal contact with both the buffer tube as well as the rear takedown pin thus increasing strength and durability from recoil and consistent firing. The P4 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 is just as strong as metal components but at only 1/2 the weight. Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO Features: Patented Omni Hybrid Upper Receiver with Front and Rear Metal Inserts Patented Omni Hybrid Lower Receiver with Front and Rear Metal Inserts Nano Composite Parts Kit 7.5″ 1:7 Twist Nitride M4 5.56 x 45mm Barrel 7″ M-Lok Free Float Rail Low Profile Gas Block Standard AR Pistol Buffer Tube for use with most Braces 30 Round Magazine   Made In United States of America WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov. Specifications Product Information Cartridge 5.56x45mm NATO Capacity 30 1 Round Weight 76 Ounce Barrel Length 7.5 Inches Threads 1/2″-28 Action Type Semi-Automatic Trigger Type Mil-Spec Safety Selector Threaded Muzzle Yes Barrel Finish Black Frame Material Polymer Grip Material Polymer Frame Finish Black Magazine Quantity 1 Grip Style Checkered Grip Color Black Compensated No Country of Origin United States of America Delivery Information Must Ship to FFL Dealer Yes Shipping Weight 6.350 Pounds