.22

(firearms) A standard kind of firearm designed to fire bullets that are approximately 0.22 inch in diameter.

Japanese Meaning

口径約0.22インチの弾丸を発射するための、標準的な銃（例えば、ライフルやピストル）

He inherited a .22 that had belonged to his grandfather and used it for target practice.

彼は祖父から譲り受けた22口径の銃を受け取り、射撃の練習に使った。

Sense（1）

(firearms) A standard kind of firearm designed to fire bullets that are approximately 0.22 inch in diameter.

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

.22s

（ plural ）