The AGG-12 grenade launcher is a grenade launcher that came into use by the Terran Dominion forces during the Great War. It can be outfitted with punisher grenades.
Marshal Rhett Shearon was known to own one. When he died, the weapon was passed on to his daughter Rin Shearon. Rin used this weapon, and the last punisher grenade in it, to destroy the zerg spire at Anvil Rock, ending the feral mutalisk threat on Choss.
Bogdanove, Kal-El. "Frenzy." (Feb. 28, 2013). Blizzard Entertainment. StarCraft Lore: Frenzy Accessed 2013-02-28.