Thread revival: Just bought a used MP22... Brought it at the range today to zero the scope. Very accurate little rifle.
User Manual: Rule #12
ALWAYS WEAR PROTECTIVE-SHOOTING GLASSES. There’s always a chance that gun powder, gas, carbon residue, lubricant, metallic particles, or other debris that may blow back and injure eyes of the shooter. Injury in such circumstances can be severe, including the possible loss of vision. ENCOURAGE OTHERS TO WEAR SAFETY GLASSES TOO!
I must be really lucky because mine blows back particles at every rounds and because I'm left handed. My right cheeks gets them all. It's annoying enough I think I'll sell it quick.
From what I see, if I were right handed I wouldn't have noticed.