Isn't it obvious?
If you're sniping that probably means you're chickensh1t, and therefore will most absolutely want to be silenced as well because you evedently can't handle someone shooting at you. So of course you're going to prefer the only two sniper rifles that can be silenced.
Sorry, I've got no love for snipers. I'm sure many will have a swift retort on the topic, but honestly it's something that takes no skill at all to do. You're lining up a dot in the middle of your screen on the head of a person that doesn't know you're there and typically it'll take you one shot to kill a person. If you want to show your skill, come out and face me

.