help ID colt upper

[Bauer C]

I just want to know what model this upper came from. I did a search but didn't see anything about the 4 marks in front of the ejection port. it does not have a 4 or m4 mark above the gas tube. The barrel is 14.5" and says "C MP 5.56 NATO 1/7".

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[Bauer C]

there is also a "7" stamped in the 9 o'clock position on the barrel extension and "01/07" behind the fsb

[Iraqgunz]

Does it have M4 feedramps in the upper? I haven't seen a Colt upper marked like that before, but that doesn't mean anything.

[Bauer C]

It has m4 feed ramps but they don't match up all that well. Heres a couple pictures of the extension.

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[Jimbo45]

I recently bought a used colt upper that has similar marks in front of the ej port. It also has the same c and forge mark as yours. It is a flat top, with no m4 feedramps, and no m4 mark at gas tube hole, and no t markings on top. I am not sure but I think this upper was off of a 6700. I mated it to a NOS colt m16a2 barrel, for an a4 clone build.

[Bauer C]

Been doing some more research but still can't find anything on the 7 marked on the barrel extension, kinda strange.:confused: