American Tactical Imports brings you the best of both worlds with their new Omni Hybrid Lower. The lightweight polymer is molded around steel inserts for greater strength or extra durability in the most critical areas. The ATI Omni Hybrid is now both lighter and tougher than a standard aluminum receiver. ATI has also reinforces the polymer around the hammer and trigger pins for extra toughness and to prevent unwanted movement during firing.
This complete OMNI Hybrid is pre-assembled by the factory, including an M4 style collapsible stock, so all you have to do is attach your mil-spec upper assembly and it's ready to rock. ATI designed this lower to be capable of handling .22 LR, .223 Remington/5.56 NATO and .410 uppers. The magazine well accepts standard AR-15 sized magazines.