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Posted: 9/6/2010 10:05:10 PM EDT
[Last Edit: 9/7/2010 7:32:28 PM EDT by m16a1000]
socom heavy barrel from colt. Does not have the f stamped on the front sight. Can someone tell me if that makes any difference as to which upper reciever it is for? I was told the f indicates it is for the a3 flattop upper
Link Posted: 9/8/2010 11:54:35 AM EDT
Yes it has a F height FSB & no it doesn't matter which upper you use.
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