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[ARCHIVED THREAD] - Upper Receiver Marks Question

Posted: 12/7/2006 4:26:53 PM EDT

I need to find out what time period Colt Upper Receivers with forging marks of CH and CK were used.
Can anyone give me an estimation?

Thank You
Avery53

Posted: 12/7/2006 5:22:17 PM EDT

[#1]

I think they started in '71

[ARCHIVED THREAD] - Upper Receiver Marks Question

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