IMI "Gamdaii"

IMI "Gamdaii" is a dual-feed 10mm caseless SMG mated to a single-shot 25mm grenade launcher. Intended to supplant current assault weapons for Mossad units, this weapon system is of high quality and fine machining.The gun feeds from twin magazines, allowing different types of ammo to be loaded. Ammo selection is via thumb-operated lever. Like most IMI weapons, the Gamdaii is easily modified for left or right-handed use. The grenade launcher's barrel is much shorter than most 25mm greande launchers; special rimmed-case, low-velocity rounds must be used (these grenades cost 50% more than normal shells, but can be bought in the same varieties as standard 25mm mini-grenades). The grenades have a range of 1 OOm, and it is impossible to load normal 25mm mini-grenades into the Gamadii's grenade launcher. 10-Gauge shells can also be loaded when using a special sleeve. Safety note: IMI's special grenades do not have a safety distance! Once primed by firing, they will detonate as soon as they hit an object Stand back!

Source

 * Solo of Fortune 2, pg.35
 * Blackhand's Street Weapons, pg.19