Same gun with the cheap Leapers 4X 32mm, but any scope of about that length should work. The 1" part of the tube is onver the loading port, but its not hard to get a pellet in there. Higher rings would give fat fingers more room, but you lose cheek contact with the stock.
Full sixed 4X:
Not why I made this group photo, and are various tyes of QB here, but the scope mounting would be the same (same eye relief /loading port requirements). Are some 4Xs, 2-7X. 3-9X, and a 4-12X being used.