I ordered a stock tube nut from a reputable online dealer a while back and got around to trying to install it the other day. When I looked at it I noticed that it was oblong, not even close to being round. It is obviously a factory defect that somehow escaped QC, but the return date has since passed so I'm stuck with it. Can i just try hammer it into a more round shape or will that cause more harm than good? The stock tube nut & lower receiver are all RRA.