Not sure about that but I have never needed one especially for an air gun. Just set up a table with a rest or use a bipod. Shoot at close range, say 5-10 yards at a paper target then adjust scope as needed. The move back to 20 -30 yards or whatever your preferred zero is and adust again.
I bought me a laser boresighter for 22-250, and I never used it. As for air rifles, I wouldn't waste my money on one. You would be better off buying a tin of pellets