Main Page | See live article | Alphabetical index A handgun is a gun small enough to be carried and used in one hand. While a two-handed aiming posture may be optimum for most firearms, including handguns, if the gun is not designed to be usable in a single hand, it is not a handgun. Two main designs are pistols and revolvers, however, single-shot handguns are also available. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.