Pistol

A Pistol, otherwise commonly known as a handgun, is "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.
 * M6C/SOCOM - A handgun variant of the M6C Magnum used by ODST's in Halo 3: ODST.
 * 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.
 * Señora Sies- A modified M6 pistol that appears in Halo: The Cole Protocol.

Covenant

 * Type-25 Directed Energy Pistol- A common Covenant weapon that is standard armament for Grunts, Jackals, and Drones.
 * Type-52 Pistol- A pistol-shotgun favored by Covenant Loyalist forces.