I'm sorry if I confused anybody, Im talking about real life...
When I say you can put a silencer on anythig, I dont mean you wont hear the gun at all. Most silencers only silence a rifle by 30db. A good silencer on a M4 will bring it down to the 140db range. Is the gun still load, yes. So why put a silencer on a gun. A silencer reduces recoil, makes the gun report soud farther away that it actully is, and gets rid of muzzle flash. So at night time, the enemy cant see you, they can only hear you. In Black Hawck Down, one of the Delta snipers was using a M14sd. I know this could just be hollywood magic. And you are right the bullet will still make a sonic boom. But on a good silecer, range and accuracy are not affected. For a video game though it has to be, for gameplay. But a bad silecer will hurt accuracy and range.
So for visual proof...
This is a spas15 shotgun with a Suppressor

Have you seen the inside of a good suppressor?

And for the m14, just scoll down this link
http://guns.connect.fi/rs/rifles.html
Some guy said( I think he was Finnish)
"Silecers don't make are troops silents, they make them invisible"
OK, i hoped I but this to rest. If you still dont belive me, please go online and check it out.
As for the game, I've hear silencers reduce damage and range.
Nice, I play paintball too(AT85, my weapon of choice)