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I have a question for you ar15 pro's I bought an m4 not long ago the upper is old one with a fixed carry handle grayish colored I been looking for the maker of the upper only thing I see is a c on the front sight and cmpb on the barrel front end, also what caliber is the barrel where can I find if it's .223 or 556? Sorry can't seem to post pics at the moment
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AFAIK, the caliber info is somewhere on the barrel. Have you taken off the handguards?sigpic
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Sounds like you have a Colt barrel.Comment
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Yes I took the handguards of and don't see anything there.Comment
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You may find what you're looking for below:
With the way you're describing your upper, it sounds like an old Colt.Comment
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Thanks Deez I will check that site out.Comment
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Well checked that site out and describes it's a colt upper But does not really say what it can shoot I don't want to shoot 556 out of the upper if it was chambered in .223Comment
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