What is "twenty-two rifle"

Usage examples of "twenty-two rifle".

I saw him bust four out of five thrown beer bottles one time with a twenty-two rifle.

He bought or was supplied with a Winchester twenty-two rifle, went to the range to sight it in, and had a silencer made for the rifle and his own forty-caliber Heckler and Koch semiautomatic.

A twenty-two rifle was found in the living room with a jammed magazine, indicating that the members of the Clare family had attempted to protect themselves against assault.