Aero M4E1-E Complete Upper, 14.5" 5.56 M4 Carbine Barrel, EM12.7 - FDE Out of stock. Check back later... $670.00 MSRP Price: $604.99 Notify me when this item is back in stock (log in required) Description Details Reviews Shipping info UPC: 840014603534Manufacturer: Aero PrecisionModel: APAR640232M32Category: PartsOtherUpper receiverStock: 0Unit/Measure: EA This item may be shipped directly to your home address, unless you live in a restricted state.