Originally Posted By Hamel:
Does the Colt 7.62x39 upper receiver have any special markings on it differentiating it from a 5.56 upper?
I bought a used Colt 5.56 barrel and upper package. Guy I bought it from "thinks" it is a colt 7.62x39 upper but couldn't be sure. The upper is an A2 only has CM on the carry handle. No other markings. Receiver has M4 ramps though.
Price was good and my plans are only for the barrel anyway so no big deal either way, but if I sell the upper, don't want to mis-advertise it.
Is there any difference? The barrel and bolt are the only parts I was aware of that determined what caliber ammunition it used.