I have a New in wrap Colt factory M4 Flat Top stripped Upper receiver. The upper is marked M4, and on the right rear is has a C and a keyhole symbol. It has feed ramps cut into it. The top rail does not have and "T" Markings.
Pics available upon request. Questions? Please Email only at firstname.lastname@example.org.
Please say you will take it here first than follow up with e-mail.
Price is $210.00
Shipping $6.00 + 3% For Paypal.