An Imperial Military Grade Grenade Casing Unit, aslo known as IMGGCU, was a grenade-based weapon that was being researched in the Lok Imperial Research Facility some time after the Battle of Yavin. In 1 ABY, Nym's Lok Revenants, the most powerful criminal organization on Lok, learned from the corrupted Imperial Sergeant Moore that IMGGCU development had achieved completion. Nym's first mate Kole thus tasked a group of spacers to raid the Imperial Research Facility. The Lok Revenants then stole a crate of IMGGCU prototypes and brought them back to Nym's Stronghold.