When I was in service I managed to get my hands on one Suomi SMG. Tried it at 150m distance , prone. Results weren´t spectacular.... Single fire : managed to hit the target assembly area which was about 1 m2. But when closed into 50m distance I managed to pump over 50% of my shots into the target reticle while firing on autofire, at least 10 shot bursts. And that was the first time I ever had fired any weapon on autofire. If I had to fight in close quarters I know which weapon I would choose.. But when range is more than 75m and targets are wearing some ballistic armour then 9mm SMG is useless without some special ammo.