Our M16A4 Clone Complete Lower Receiver features custom engraving on our AR15 Gen 2 Lower Receiver and is the perfect complete lower for your M16A4 clone build. - Includes: - M16A4 Lower Receiver - Standard A2 Stock - Standard A2 Grip - Lower parts kit - Receiver extension - Rifle buffer kit - These parts are installed - M16A4 Lower Receiver Features: - Custom Aero Precision logo - Markings include: Property of U.S.A. MOD M16A4 CAL. 5.56MM - Serial number designation - Safe/Semi/Burst safety selector markings - Gen 2 Lower Receiver Features: - Upper Tension Screw- Allows users to fine tune the fit of the upper and lower receiver through the use of a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver. - Increased Magwell Flare- Allows for easier insertion of magazines and provides a sleeker look.