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Posted: 6/29/2026 5:18:51 PM EDT
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Hey guys, I recently got this a1 upper at a auction. The rest of the upper appears to be colt but the barrel only has 1 C marking on the underside of the barrel in front of the FSB. Can't turn up any examples of only having this marking on any of my online research. Any help anyone could give me would be much apricated. https://imgur.com/a/bnL8GGm Thanks |
Lol lord, we have retroguy69 and Retroguy2 both posting threads rn  This one is certainly an oddity. My initial thought was an arsenal rebarrel of some kind, but those allen key FSB screws are weirding me out. |
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"A people that values its privileges above its principles soon loses both"
“So Freedom Will Reign” / “SEEK! STRIKE! DESTROY!” / “Led By Love Of Country!”
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