I am looking to swap uppers. I have an extra (unfired) 10.5” 556 NATO 1/7 NITRIDE 9" LIGHTWEIGHT M-LOK UPPER that I am looking to trade for a PSA 16” upper with a 15” rail. I am only looking for railed uppers, not interested in classic or MOE. I would consider trading for a 13.5” rail so send me any offers. I also have a stock that I can throw in the trade or add cash for Magpul sights.