Can 22 caliber repeating co2 kill something?

Yes, a .22 caliber CO2 pellet gun can potentially kill small animals or significantly injure them, depending on the velocity of the pellets and the distance from which they are fired. While these guns are generally designed for target shooting and pest control, they can be lethal if used improperly or irresponsibly. It's crucial to handle any firearm, including air guns, with care and to follow all safety guidelines and local laws regarding their use.