Aero M4E1 Threaded Stripped Upper Receiver - Anodized (C) Available to order on-line. Ships in 5-14 days $150.00 MSRP Price: $134.99 Description Details Reviews Shipping info UPC: 815421023756Manufacturer: Aero PrecisionModel: APAR700201CCategory: 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.