This is a factory Colt A2 fixed carry handle M4 upper receiver. The upper receiver was removed from a new-in-box preban Gov't Carbine (R6520) upper. The receiver has the M4 feed ramps and is properly marked with a "4" above the gas tube hole. It has a small front hole. The upper receiver is in like new condition with no bolt wear. The receiver is complete with the forward assist, rear sight assembly, and ejection port cover. No other components.
If requested, I can email pictures or clarify any questions.
Price is $175 shipped. I prefer Paypal, or will accept a USPS money order. No trades at this time.
The receiver is sold. Thanks.