Single barrel, over/under, side by side, semi-auto, pump, lever, full-auto
There are many different types. There are pistols, rifles and shot guns. Pistols can be semi auto or single shot or a revolver. Rifles can be semi auto or full auto or bolt action or single shot or lever action. Shotguns can be semi auto or pump or single or double shot.
There are many different types of guns! Shot guns, rifles, hand guns, pistols, even paint guns and air soft guns. Then with each type there are different callibers, which is the size of the bullet that is shot through it. the higher the number the bigger the calliber therefore the bigger the bullet and generally the bigger the gun.
how many types of guns are there in the world?
As many as you have money to buy.
Many different types of ammunition were used by various countries during World War II. Some were bombs dropped from airplanes, bullets shot from different types of guns, and torpedoes shot from submarines.
Two: Hand guns and Long guns
There are only two types of firearms. Long guns and hand guns.
This question is hard to answer because it needs to be more specific. Are you asking how many operating types of handguns? Such as revolvers, semi automatic, single shot, muzzle loader, etc? Or are you asking how many models, of all guns, of all companies ever? Or another type of question altogether?
They don't. They are shot by PEOPLE that are using guns.
Long guns, hand guns, artillery
There are only two types, long guns and hand guns.
Four guns total. Two 9mm firearms and two 12-gauge shot guns.