never heard of em or used em
That site looks super simple and low budget. I am not saying for sure you got scammed but you never know. My bet and gut feeling tells me they are legit just not a big enough player to get top priority on allocated or back ordered items.
What was the pistol? If you got it for a good enough deal to be worth the wait then I would say no issue. If you only paid a few dollars off the larger sellers I would say it wasn't worth the risk.
Good Luck, Vermonter