Description Our M4A1 Clone Complete Lower Receiver features custom engraving on our AR15 Gen 2 Lower Receiver and is the perfect complete lower for your M4A1 clone build. Features: Custom Aero Precision logo Markings include: Property of U.S.A., MOD M4 CARBINE, CAL. 5.56MM Serial number designation Safe/Semi/Auto safety selector markings Specifications: Made In America?: Yes FFL SOT Shipping Required: No Platform: AR15 Series: M4A1 Select Your Finish: Anodized Black Receiver Extension: Carbine Compatibility: Works with standard AR15 components and magazines INCLUDES: M4A1 Clone Lower Receiver Standard Collapsible Stock Standard A2 Grip Lower parts kit Receiver extension Carbine buffer kit These parts are installed Additional information Weight 76.05 oz MPN APAR501145 UPC 840014607556