Aero M4E1-E Complete Upper, 8" 5.56 Pistol Barrel, EM7.3 - Ano Out of stock. Check back later... $565.00 MSRP Price: $509.99 Notify me when this item is back in stock (log in required) Description Details Reviews Shipping info UPC: 840014618811Manufacturer: Aero PrecisionModel: APAR640269M102Category: PartsOtherUpper receiverStock: 0Unit/Measure: EA This item may be shipped directly to your home address, unless you live in a restricted state.