Air. I did leave out the part where 1.5 in is in a 2x4 bottom plate tho. I use the 22 on steel studs and if there is ceramic tile. I build out commercial spaces and typically add partition walls. I use a passloade model f350s at 120 psi. My opinion best framing gun made.
Thanks for the explanation. Thought it had to be air. And I agree - no better framers than Paslode.
My finish nailers and staplers (air) are all Bostitch.
My usage is all residential.