The PPSh-41 has hilariously "thick" sound, it's almost like I'd imagine a .50 cal machine gun (and the FX guys in action movies seem to agree with me). I was wondering how much of the muzzle energy actually went to producing the sound instead of propelling the bullet, and whether the bullets were just a side effect and the main purpose of the weapon was actually just to intimidate with its sound.
Then I read the Wikipedia article and apparently, Sledge Hammer would approve of this weapon since it has a built-in "loudener" -- ie. the barrel jacket sides are drilled open to act as a primitive muzzle brake, which considerably increases the sound it produces but does little to dampen recoil as it should have.