.22

plural .22s

1. engineeringA firearm chambered for a .22-caliber rimfire cartridge.

   I would rather have a .22 than an axe or a club, that's for sure

   2001, Chilco Choate, The Fire Still Burns: A Life of Trail Talk and Contrary Opinions, page 29

   1 more example

   Once I borrowed the boss’s .22 rifle, and getting a good ‘possie’ round a haystack, popped off a couple of chooks before they knew what had happened.

   1933, Frank Clune, Try Anything Once, Sydney: Angus and Robertson, page 79