Tie between the Vector and SG556. (I know it's now the SWAT556, but I don't care it's called the SG556 in combat arms and that's where I know it from) --- Yeah, I'm a Furry. Don't hate. You're just mad you don't have big fluffy fox ears like me! =^w^= I'mma Red Fox. :3 Playing: Minecraft.
I'll be getting them gold and playing around with the Rafficka(or whatever this game calls it as I don't remember nor do I have any intention to until this comes out) --- Got back from Oregon 07/05/2010. Wasn't gonna leave but then I saw this: http://img149.imageshack.us/img149/9075/sam1064.jpg psn: EternalGST
Only difference with the KSG is it's designed to be ADS for best performance since it shoots a slug instead of pellets/buckshot.
It's literally the shotgun version of a Sniper Rifle.
If it really is the way it sounds, I will love it to death and use it forever. I've wanted a slug shotgun in CoD for years. But beta tester opinions made it sound bad, I think they said it gets way too many hitmarkers. --- All's fair in love and war, kid.