Some good posts on here. Just wanted to add alittle knowledge for those who might not be familiar with them.
Hiram Maxim developed the "silencer " to muffle the sound of internal combustion engines, and at the same time developed the firearm suppressor.
Without shooting a sub sonic load, they are by no means "Hollywood" quiet. What they do , with standard ammo, is reduce the decibles at the muzzle. Most ear plugs are good to reduce heard noise @ 32 decibles. A decent suppressor will take @35 decibles off at the muzzle.
The super sonic "crack" is still heard, but down range. And you can not tell what direction the shot came from.
American by birth, Southern by the grace of God.