Pistol

A Pistol, otherwise commonly known as a handgun, is a "a firearm that is held and fired with one hand". There are several references to a "pistol" in the Halo universe:

United Nations Space Command

 * M6A Handgun- a civilian handgun used by human security forces
 * M6B Handgun- a civilian handgun used by human security forces
 * M6C Magnum Sidearm- A pistol featured in Halo 2 that is a cut-down version of the M6D Pistol.
 * M6D Personal Defense Weapon System- A high powered pistol common in Halo: Combat Evolved.
 * M6G Personal Defense Weapon System- The M6-series pistol used in Halo 3.
 * Jilan al-Cygni's Pocket Pistol- A small, handgun that appears in Halo: Contact Harvest.

Covenant

 * Plasma Pistol- A common Covenant weapon that is standard armament for Grunts, Jackals, and Drones.
 * Mauler- A pistol-shotgun favored by Covenant Loyalist forces.