Finish your AR-15 M4E1 lower receiver with this Aero Precision Complete Lower Parts Kit with Magpul MOE pistol grip and a Mil-Spec trigger group. This AR-15 LPK comes with everything you need to finish an M4E1 lower and includes a 4-40 set screw for use with the threaded takedown pin detent hole present on most Aero Precision lowers. This makes it extremely easy to install the spring and detent without need to use the end plate to capture it. With a wide variety of lower parts kits available from Aero, you can choose the right one for your build.
Cancer and Reproductive Harm