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Can you id this M-4 upper forge mark for me?
Hi,
I am in the process of building a MK12 Mod1 clone and purchased this used vintage upper from Gun Broker. I thoroughly checked it up close and feel it is authentic. I was told what date it is from but want to make sure it is not a reproduction. I found one just like it from this site, so I feel better, but the seller would not trade with me when I asked to swap with another of his auctions. This is my first post, so not sure if I'm posting in the correct forum, so forgive me if I'm not. Thanks!