Gurps SOE Weapons?

[Anthony]

Originally Posted by The Colonel

Mind you, as I understand it, most use of suppressors is not so that people don't hear you, but so that you can still hear after firing the damned thing indoors.

Certainly that's the reason a normal gun enthusiast might have one, but various special ops and internal security services have used silencers with a primary goal of avoiding being heard. A more recent example would be the Russian PSS. In general I'd be suspicious of weapons redesigned to be subsonic, as the sonic boom mostly travels sideways and thus doesn't directly affect the shooter in the first place.