I was thinking...
+fires team-colored, line-shaped projectiles that bounce off surfaces
+infinite ammo
-fires only one pellet per shot, as opposed to 4 by the ballistic miniguns
-slow firing speed, about 4-5 rounds per second
-overheats to prevent excessive spam
-low accuracy
in practice, this would be the ultimate room-clearing weapon. you could also shoot projectiles out corners, bouncing on the walls, and hurting enemies without them being able to hurt you.
the fact that the projectiles shoot off to random directions makes this weapon quite ineffective when used outside, so you better equip your shotgun in case you are forced outside.
what do you guys think?