Never fired. Will consider trades. ATI® Omni Hybrid Maxx RIA P3 .223 Wylde Semi-auto AR-15 Rifle with American Tactical Reflex Sight, Battlefield Green Forget "heavy metal"—polymer is the future. The Omni Hybrid Maxx features ATI's metal-reinforced polymer upper and lower receivers…which help to reduce weight and increase maneuverability without sacrificing durability. The lower receiver features an over-molded metal insert, which reinforces the buffer tube housing and rear takedown pin. This allows for metal-on-metal contact with both the buffer tube as well as the rear takedown pin, delivering the strength and durability to withstand recoil and constant use. 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. But the weight reduction doesn't end with the polymer upper and lower receivers. 223 Wylde is a hybrid chamber designed to let barrels be able to safely shoot both . 223 Remington and 5.55mm NATO rounds out of the same barrel without loss of accuracy.