Aero Precision M4E1
The Aero Precision M4E1 Complete Lower Receiver ships fully assembled with Magpul MOE SL pistol grip and carbine stock in 5.56 NATO/.223 Rem configuration. The enhanced M4E1 profile includes an integrated trigger guard and black anodized finish, ready to accept any mil-spec AR-15 upper. Features a threaded bolt catch pin and nylon-tipped tensioning screw for a precision upper-to-lower fit.
