The M4E1 Complete Lower Receiver is the perfect base for your custom AR-15 build. This complete lower features Aero Precision's new M4E1 Lower Receiver with an A2 Grip and M4 Stock. M4E1 Stripped Lower Receiver – Anodized Black M4 Stock – Black A2 Grip – Black Mil-spec Lower Parts Kit Carbine Receiver Extension AR-15 Carbine Buffer and Spring Mfg: Aero Precision
