Description: ATI Omni-Hybrid Maxx AR-15, Semi-automatic,.223 Remington 16" 30 Rounds Incredibly tough. In fact, the Omni-Hybrid lower has been specifically tested to withstand all sorts of use and abuse. The folks at ATI put it through all the pressure and weight-bearing tests, similar to the US Military's testing, and found it to function flawlessly, even after supporting up to 250 lbs. and being run over by an 800-lb. forklift. Then, they ran 2,000 rounds through it without a hiccup. Features: - Fully patented metal-reinforced polymer lower receiver - Reinforced at critical point of buffer tube housing - Fully patented inter-lock hammer and trigger pin retainment system, prevents movement during firing - 7" free float quad rail - Mil-Spec AR15 lower parts kit - Beveled mag well - Enhanced trigger guard - Includes Magpul PMAG magazines - Mil-Spec compatible - 6 Position Rogers Super-Stoc Specifications: - Caliber: .223 Remington - Action: Semi-automatic - Capacity: 30 rounds - Barrel length: 16" - Barrel twist: 1:7" - Barrel material: Melonite coated - Stock: 6-position collapsible - Upper receiver: Metal-reinforced polymer flat-top upper, accepts MIL-SPEC parts - Lower receiver: Metal-reinforced polymer - Overall length: 35" - Overall weight: 6.25 lbs. UPC: 813393018046