I would say the Famas,Ak47,Ak7fu,Gali...

my fav is:
ak47u silencer

ghost,sleight of hand,ninja

works perfect!

Main classes I use

For S&
SMG under lvl 17: MP5K with Rapid Fire
Lighweight, Sleight of Hand, Hacker
SMG above lvl 17: AK-74U with grip
Lightweight, Sleight of Hand, Hacker

Assault rifles:

Over lvl 38: AK47/ Commando with silencer
Ghost, Sleight of Hand, Hacker/ Ninja
Under lvl 38: Famas, AUG or Enfield with silencer
Ghost, Silencer, Hacker

For Demolition, HQ etc.
SMG:
AK74-U with Grip and/or Silencer
Scavanger/ Hardline, Warlord/ Sleight of Hand, Hacker
MP5K with Rapid Fire
Hardline, Sleight of Hand, Hacker

AR:

AK47/ Commando/ Famas/ AUG with silencer
Scavanger, Sleight of Hand, Hacker

Run& Gun class:
SPAS-12 with silencer
Ghost/ Lightweight, Sleight of Hand/ Steady Aim, Marathon

Galil for sure that is until I get my comando back every prestige.

As far as early weapons and assault Rifles the ENFIELD is pretty nasty, Later on the in game the Commando is very nasty and I have noticed the FN FAL is pretty much a 2-3 shot kill but keep in mind it's a Semi-Auto so takes getting used to. As far as SUB's the AK74U is well as you know the top weapon in this category. You need to find what gun works for you and your reaction time.

Commando, galil and g11

I like the Famas. Good gun at a early level and also than Commando

Ak74, Famas, Galill, Commando, Ak47.

love this thread