The trailer for Unit 13, an upcoming PlayStation Vita game from SOCOM developer Zipper Interactive, features a grenade made out of guns. If you know nothing else about the game, that still ought to be enough to get you excited.
The game looks a bit SOCOM-ish, only with multiple soldier classes; Pointman, Infiltrator, Technician and such. There's also two-player co-op and some form of touchscreen controls. So in case anyone was worried that there wouldn't be anything to shoot when the PlayStation Vita arrives next year, fear not: Unit 13 is a thing.