Is anybody using sub-machine-guns? Do they have some hidden value or do they really suck?
They have less or equal range as shotguns but do way less damage, some (all?) can put all bullets of a burst in one target, but the burst is just 3 bullets and the damage/bullet is low(~20). The ammunition isn't great either (9mm AP has -40% damage, 9mm JHP is next to useless against armor, .45 isn't universal enough).
I've only tested a MP5 (~30dmg/burst), and a Walther MPL (~50dmg/burst) but rest of the guns don't look much better in the wiki and it looks like smgs perform somewhat like unaimed pistol shots, but at 5x ammo cost.
I refuse to believe that the Devs made a whole category of useless guns, so what's the key to using SMGs effectively?