.22 caliber

（重定向自.22）

The 5.6 mm caliber or .22 caliber, is a small, extremely common size of ammunition, fitted to firearms with a bore diameter of 5.6 mm (0.22 in). It is the most common bore for rimfire ammunition.

5.6 mm caliber rimfire variations include:

单词	.22
释义	.22 英语百科 .22 caliber （重定向自.22） The 5.6 mm caliber or .22 caliber, is a small, extremely common size of ammunition, fitted to firearms with a bore diameter of 5.6 mm (0.22 in). It is the most common bore for rimfire ammunition. 5.6 mm caliber rimfire variations include:
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