Shotgun
A shotgun is a type of gun. To make a shotgun work, gunpowder is lit by a primer inside a shotgun shell. The gas from the burning gunpowder pushes whatever is being fired out of the barrel (usually a bullet). Originally, a shotgun shell would have small lead balls called a "buckshot" or "birdshot". Now, instead of lead shots, the cartridges have iron or steel balls, because lead in the environment can poison wildlife. The balls spread out when they are fired. Sometimes a shotgun shell will have bigger shot, of bullet size, called a "slug".
A shotgun usually has one or two barrels, each with a chamber to hold a shell. These barrels can be next to each other ('side-by-side') or on top of each other ('over-and-under'). There are many types of shotguns with different ways of loading and shooting. Some will snap open, and shells can be put inside until they are shot again. These are called break-open shotguns. Others hold more shells and are pumped back and forth to shoot. These are called pump-action shotguns. Some shotguns are semi-automatic, so each time the trigger is pulled, one shot is fired without any need to use a pump or a lever. These are semi-automatic shotguns. Some shotguns are fully automatic, meaning that pulling and holding the trigger back will keep shooting the gun without needing to reload until the shotgun is out of ammunition. These are automatic shotguns. However, these types of shotguns are not common.
Shotguns can also fire things that do not kill people. Police use small things like rubber balls and beanbags filled with the small metal balls instead, to cause non-deadly injuries.
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