Handgun

A revolver (also called a six shooter or a wheel gun ) is a repeating handgun that has at least one barrel and uses a revolving cylinder containing multiple chambers (each holding a single cartridge) for firing.

A derringer is a small handgun that is neither a revolver nor a semi/fully automatic pistol.

Such firearms include handguns such as revolvers, pistols and derringers, and long guns such as rifles (including many subtypes such as anti-material rifles, sniper rifles/designated marksman rifles, battle rifles, assault rifles and carbines), shotguns, submachine guns/personal defense weapons and squad automatic weapons/light machine guns.

It can also be used to describe a stockless handgun-style submachine gun.

A sidearm is a weapon, usually a handgun, but sometimes a knife, dagger, sword, bayonet, or other melee weapon, which is worn on the body in a holster (in the case of a pistol or revolver) or sheath (in the case of a knife, dagger, sword, or bayonet) to permit immediate access and use.

In small arms, a long gun or longarm is generally designed to be held by both hands and braced against the shoulder, in contrast to a handgun, which can be fired being held with a single hand.

The Model 27 started the "Magnum Era" of handguns.

The Colt Single Action Army (also known as the SAA, Model P, Peacemaker, or M1873) is a single-action revolver handgun.

Since standard-pressure .45 ACP rounds are subsonic when fired from handguns and submachine guns, it is a useful caliber for suppressed weapons to eliminate the sonic boom.

A pistol is a handgun, more specifically one with the chamber integral to its gun barrel, though in common usage the two terms are often used interchangeably.