I’ve never fired a 10mm, but understand that the Glock 40 has a fairly light recoil considering the size. I’m at the stage in life where the biggest hand gun that I’m comfortable with is a 9mm. Granite State Gun Range is offering free rentals to vets this weekend, so long as you buy the ammo. If I get time to go up there, I’d like to try some new stuff out. Maybe I’ll get to try the Glock 40, after watching somebody else fire one.