Submachine Guns for Mass Effect 3 on Wii U (WiiU)
There are but a few destructive submachine guns to be found in ME3, so make sure you don't miss any of them.
M-4 Shuriken: You'll find this gun during the Priority: Mars mission, inside the security room with Liara. Grab it before you activate the security console.
M-9 Tempest: Found inside the caves after defeating the husks and climbing the ladder during the Tuchanka: Turian Platoon mission.
M-25 Hornet: Upon taking the elevator up to the new area in the Priority: Citadel mission, look for this gun on the right side along with some other items.
M-12 Locust: Found in a lab early in the Priority: Horizon mission.