M460 Automatic Grenade Launcher
From Halopedia, the Halo wiki
The M460 Automatic Grenade Launcher (AGL), is a United Nations Space Command grenade launcher that is mounted on the UH-144A Falcon. The weapon has two firing modes which are similar to those of the M319 Individual Grenade Launcher. Tapping the trigger causes the weapon to fire a single grenade round that detonates on impact. Holding the trigger fires a grenade that will not detonate until the trigger is released. Grenades fired in this mode release an electromagnetic pulse on detonation; this EMP is capable of disabling most electronics, including those aboard vehicles and energy shielding emitters.
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