An IMGGCU, or Imperial Military Grade Grenade Casing Unit, was a weapon utilizing grenade technology. Research and development were underway at the Lok Imperial Research Facility following the Battle of Yavin. In the year 1 ABY, the notorious criminal syndicate known as Nym's Lok Revenants discovered from a compromised Imperial Sergeant named Moore that the IMGGCU project had been finalized. Consequently, Kole, Nym's first mate, assigned a team of spacers with the mission of infiltrating and raiding the Imperial Research Facility. The Lok Revenants successfully absconded with a shipping container containing IMGGCU prototypes, which were subsequently transported back to Nym's Stronghold.