On April 19 I ordered a stag Arms 6H upper on sale.  The status of the order this entire month is awaiting fulfillment. On the webpage the following day they state the upper is out of stock. Has anybody have had this issue? What did they do about it? I don't want to cancel the order because it was a great price $498 with bipod. But $495 isn't really a bargain is you don't get the upper.

Call em up and ask

+1, call them. I will say though, the handful of times I have ordered parts from stag, it was painfully slow getting my parts. A rifle length buffer tube, buffer & spring took me a month and a half to get for a budget build

Calling them is what I need to do. I have a completed lower, optics, ammunition and  access to a 300 yard range. Kind of useless missing half the rifle lol