Aero M4E1-T Complete Upper, 8" 5.56 Pistol Barrel, RM7.3 - FDE Out of stock. Check back later... $605.00 MSRP Price: $544.99 Notify me when this item is back in stock (log in required) Description Details Reviews Shipping info UPC: 840014618866Manufacturer: Aero PrecisionModel: APAR700711M102Category: PartsOtherUpper receiverStock: 0Unit/Measure: EA This item may be shipped directly to your home address, unless you live in a restricted state.