The only question I would have is who Century procured the uppers and lowers from. If its a in spec. quality receiver set up I would have no issue at all with having one of the things. Even a blind monkey can have a issue trying to mess up the head spacing on a AR receiver. I have a Century L1A1 I got years ago that works just great as it has a Imbel receiver not the Hess out of spec. junk they put out later.
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