I swear to God I hate human beings. There is one purpose for guns, KILLING. PERIOD. That is it. They serve no other purpose. Idiots
If every gun's purpose is to kill people why do so few accomplish it? This is really headed towards the Tinder Box but that is such a liberal close minded idealist view of what a gun is.
Some guns are for collecting, some of them are never fired the way some Star Wars figurines are never played with (oh no toy comparison again). Wild West and World War II era guns are examples of this.
Some guns are for practice and competition. These weapons tend to be low caliber weapons designed for teaching firearm safety and accuracy. The majority of people that learn how to shoot a handgun never utilize the skill outside of a controlled environment. They are not practicing and competing to kill people.
Some guns are for hunting. These weapons can vary in caliber and range but their purpose is to kill animals of various sizes. They are not designed to kill humans.
Some guns are for killing people. Some guns are designed to put down people quickly without changing magazines frequently. These weapons need to have power, velocity, and accuracy to kill targets with less bullets. That would be Zod's efficiency.
The OPs .22 Cal weapon does not have power or velocity. It does not have long range accuracy. It's the smallest and cheapest widely accepted bullet. It would take multiple bullets, maybe an entire clip in an unarmored target to kill someone with that weapon. It's a toy. My dad taught me to shoot a .22cal when I was 7. It's a training gun for kids. Or a cheap toy for adults.
TLDR If you picked the OPs gun on Call of Duty you wouldn't kill anyone. Not even the dogs.