The SWFA fixed-powers are great on springers as well, rated for them so no worries if one craps. I just put a 10x on my Air King .22 after futzing around with various other red dots and such. A 6 might be better for general use, but a 10 is what I have.
You’ll want a rail that compensates for “barrel droop”, even with fixed-barrel guns. Thought the Air King would be immune to that. Wrong-a-roo!
https://www.pyramydair.com/article/Scope_shift_and_barrel_droop_two_common_problems_March_2008/46
