For my fellow gantbombers convenience here are the gun charts made from the game files.
Latest version with explanations:
Dude does these for most of the big multi player FPS games that come out, big props to him.
my own HIGHLIGHTS:AK74u does not appear to be overpowered at all (taking into consideration damage and rounds per minute), contrary to popular belief.
It has a tiny bit less centre speed of 1600 compared to MP5's 1700 (this is AK74u's downside) but faster reload and a few more more customising options.
Assault rifles can be basically divided into ones that do 40-30 dmg with 750 rpm, ones that do 35-25 dmg with 937.5 rpm; and the ones that do single shots and three shot bursts.
FAMAS slightly edges out its equivalent full auto assault rifles by having a slightly higher center speed.
Sniper rifles will NEVER one shot kill with a silencer even with a headshot.
L96A1 is the only bolt action sniper rifle but it has the advantage of being able to one shot even to lower torso unlike other rifles (without silencer of course)
Python can 2 shot a dude at under 10m ; 3 shots at under 25 meters
Silencers on all weapons (except snipers) do not decrease damage they just make their bullet damage drop at a shorter range then standard, so at long range it will not matter to bullet damage if you are using a silencer or not. (green line is silencer modifier)
Tactical Mask Pro perk is actually really good, making you only suffer 10% of duration of flash bangs or stun grenades. (this is just the one pro perk I didn't have info on earlier)
Current lists below (health is 100):