I realize that I'm a little late to the game, but I want to assemble a 5.45x39 AR15. In addition to my 5.56x45 chambered AR15's, I also have built 7.62x39 and 6.5 Grendel. I purchased a 5.45x39 marked lower receiver and was lucky enough to have an upper receiver that's virtually a perfect finish match to it. I did some searching, but can't find a barrel and bolt. Any ideas where I can get them?
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