None. People killed them. The type of instrument used is really not relevant.
The 30.cal machine gun.
People are not killed by guns. People are killed by other people. Some use guns, some use other objects.
No way to answer your question. There is no gun registration in most of the US (contrary to popular belief) and no way of identifying where a given gun was purchased.
Impossible to answer. No data collected.
More than Canada.
No gun, on it's own, has ever killed anyone or anything. If you are asking which gun has been used by the inhabitants of this planet to kill other inhabitents, that specific data is not available.
There are more people killed each year from a 22lr than any other gun!! There are more people killed each year from a 22lr than any other gun!!
the United States has the most gun-related deaths among developed countries.
Jim Miller is most known for being an outlaw and assassin in America's old west. He is known to have killed at least 12 people during gun battles before eventually being lynched and killed.
No gun killed Lincoln.
It killed lots of people who were fighting against :)