M319 grenade launcher

The Unidentified Grenade Launcher was a single-shot explosives launcher in use by the UNSC during the Human-Covenant War, specifically during the Battle of Reach. It will be appearing in the upcoming game Halo: Reach.

Trivia

 * It appears to be roughly based off of the M79 grenade launcher, a weapon used throughout the Vietnam War. This is due to its single-shot break-action configuration.