Aero M4E1-T Complete Upper, 18" 5.56 Rifle Length Barrel, SM15 - FDE Out of stock. Check back later... $705.00 MSRP Price: $634.99 Notify me when this item is back in stock (log in required) Description Details Reviews Shipping info UPC: 840014601639Manufacturer: Aero PrecisionModel: APAR700315M8Category: PartsOtherUpper receiverStock: 0Unit/Measure: EA This item may be shipped directly to your home address, unless you live in a restricted state.