The SPAS 12 is the best CQB weapon, if you have the ability to get one shot kills and rush people down, this weapon is a monster, however, the fact that its a shotgun makes it very bad for anything outside of close battles, but inside it, its a monster.
4th) Phase Rifle
This weapon is a very good weapon, best ranged weapon, and is a OP weapon with all the Specialization perks and in the hands of a good PR user, but it does require a bit of skill to use right, esp so in CQB.
3rd) Hive Cannon
Spray machine this gun is, no other weapon can fire as much ammo as the Hive Cannon, and the accuracy of this weapon is very good, a little to good tbh, the only thing keeping this weapon from being completely OP is the low damage, only 9 per shot meaning you need quite a few to kill, but that's its only balancing factor though, but its enough to keep it from the number one spot imo.
SMAW is simply OP, nuff said.
This gun is the most versatile gun in game, above average in almost every aspect, and its just a beast, the only true downsides for me is the small clip size and poor hip-fire at times, but other than that, simply amazing.
That's my list, comment on yours, I wanna hear. :D
Conduit, More, Often. Wanna learn about Conduit 2? The good and bad? Click here -> http://www.youtube.com/watch?v=UfmmTxWMgPU