these are my most favorite and probbaly the best weapons in the game
ak47 silenced
P90
barret 50cal
golden desert eagle
mp5 silenced

my profiles all use

dead silence
uav jammer
claymores

what more needs to be said

Ok here's my favourite weapons :

Assault rifle ...... AK47 with red-dot (hate acogs)
Sub machine gun... AK74u silenced
Light machine gun .. M60E4 with grip
Shotguns (only 2) .. M1014 with grip
Sniper rifle ........R700

Although i'm trying out this silenced G3 and its doing ok (good long distance)

I used all different perk, if im trying to rush then i'll use dead silence and uav jammer and 3 frag grenades.
But if i was camping,sniping or tactical postioning(you decide) then i'd use uav jammer, claymore and iron lungs.

Loads of different combo's to try