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9/22/2017 12:11:25 AM
Posted: 9/8/2003 1:26:18 PM EDT
I just received a new Colt M4 upper. I noticed that their are white marking (T2, T4, T6 etc) along the top of the receiver. I hadn't seen these before and was wondering what the story was with them. Thanks in advance.
Link Posted: 9/8/2003 1:47:01 PM EDT
[url]quarterbore.com/kac/kacrisras.html[/url]
Link Posted: 9/9/2003 8:19:44 AM EDT
Thanks for the quick answer - my curiosity is happy now.
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