Aero M4E1-E Complete Upper, 18" 5.56 Rifle Barrel, EM15 - Ano Available to order on-line. Ships in 5-14 days $665.00 MSRP Price: $633.00 Description Details Reviews Shipping info UPC: 815421023312Manufacturer: Aero PrecisionModel: APAR640251M8Category: PartsOtherUpper receiverStock: Ships in 5-14 business days.Unit/Measure: EA This item may be shipped directly to your home address, unless you live in a restricted state.