Aero M4E1 Enhanced Assembled Upper Receiver - Anodized (C) Available to order on-line. Ships in 5-14 days $220.00 MSRP Price: $199.99 Description Details Reviews Shipping info UPC: 815421022339Manufacturer: Aero PrecisionModel: APAR600201ACCategory: 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.