Out of spec gas key

Gas key out of spec. Inside diameter of gas key does not allow the gas tube to fit inside, negatory. Tried multiple gas tubes and inserted multiple known good assembled rifles, no go - will not go into battery on any. I am disappointed in AD for sending this out, should have been easily caught at QC if it was checked. I am waiting for my RMA from PA and am confident they will take care of this as they always do. I will give AD another chance and have this replaced with same model as all the other machining and finish on bolt and carrier looked really good. Will update once I receive the replacement.