Aero Precision M4E1 Complete Lower Receiver .223 Remington/5.56 NATO Semi-Auto, Black - APAR600103

The Aero Precision M4E1 is a complete lower receiver chambered in .223 Remington/5.56 NATO with semi-automatic action. It features an integrated trigger guard, flared magwell, Magpul STR stock, and Magpul MOE grip, finished in black hardcoat anodize.