Single shot, revolver, automatic, semi-automatic
Rifles, shotguns, handguns
Handguns can range from about $200 and up. Some guns are a couple of thousand dollars or more.
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It's in different places on different handguns. On some guns, it's on the barrel. On some revolvers, it's under the crane. On some it's under the grips. Also, some guns don't have a model number printed on them.
The brands that are well made are not. There are some cheap crappy handguns that are prone to breakage, but that's been the case ever since cheap crappy handguns have been made, even before polymer was used.
Yes, handguns have a serial number.
Old gun catalogs
Not sure but Taurus makes some reliable handguns.
Yes, handguns were used in WWI, and WWII.
There are only two types, long guns and hand guns.
Most historians believe handguns were first invented in the mid 1400s.
In most U.S. States, handguns don't require registration.