I have finally gotten around to the mod we're been waiting for...The Complete Assault Rifle Overhaul! I put quite a bit of research into this one (even more than others) and found some very interesting stats that were different from real life, and some damage scales that just seemed off. The SCAR H CQB and the G3KA4 should be the highest damaging rifles, when the AK47 is the highest damage in the vanilla game! Many guns have simply innacurate fire-rates, such as that of the M468 (should be 750rpm) and the SCAR H CQC (should be 625rpm). 
Here is a list of changes I have made to the guns...

SCAR-H CQC
-Damage increased
-Fire rate reduced to real life values (from 750rpm to 625rpm)
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)
-Magazine size adjusted to real life value (from 30 to 20 rounds)

M8
-Damage increased
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)

AUG A3
-Damage Increased
-Fire rate increased to real life values (from 660rpm to 680rpm)
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)
-Magazine size increased to value at which it would be for high-intensity fire fights (from 30 to 40 rounds per magazine)

G3KA4
-Damage increased
-Clip size adjusted to real life value (from 30 to 20 rounds)
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)

552 Commando
-Damage increased 
-Fire rate reduced to real life values (from 780rpm to 700rpm)
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)

G36C
-Damage increased
-Fire rate increased to real life values (from 720rpm to 750rpm)
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)

TAR-21
-Damage increased
-Fire rate increased to real life values (from 840rpm to 900rpm)
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)
-Magazine size increased to value at which it would be for high-intensity fire fights (from 30 to 40 rounds per magazine)

FAMAS-F1
-Damage increased
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)

AK-47
-Damage increased
-Semi-auto reduced to real life value (from 60rpm to 40rpm)
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)

M468 
-Damage increased 
-Fire rate increased to real life values (from 600rpm to 750rpm)
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)

FN-FNC
-Damage increased
-Fire rate increased to real life values (from 600rpm to 700rpm)
-Magazine size increased to value at which it would be for high-intensity fire fights (from 30 to 40 rounds per magazine)
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)


L96-A2
-Damage increased
-Fire rate increased to the gun's more CQB values (from 600rpm to 750rpm)
-Magazine size increased to real life value (from 25 to 30 rounds per magazine)
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)

AK-74u
-Damage increased
-Fire rate increased to real life values (from 600rpm to 650rpm)
-Supressor lowers damage less (from 0.75x damage to 0.85x damage)
-Removed extended magazine option (for realism, and to encourage scope diversity)

How to Use This Mod
1. Create a backup of your KellerGame folder (incase you wish to revert back to the old Assault Rifles)
2. Go to C:\Program Files (x86)\Steam\SteamApps\common\Rainbow Six Vegas 2\KellerGame\Config (or where ever you game is located) and open upDefaultWeaponsConfig
3. Press "CTRL-F" and type in or paste "[R6Game.ConfigR6AssaultSCARHCQC]" and hit "ENTER"
3. Highlight everything from "[R6Game.ConfigR6AssaultSCARHCQC]" down to the last line before "[R6Game.ConfigR6AssaultSCARHCQC]" (which should be "m_fireModeAvailability=true)
4. Hit "DELETE" (remember to have the config backup!)
5. "CTRL-A" and "CTRL-C" inside of "The Complete Assault Rifle Overhaul" text file, and paste in in place of where the text you just deleted would be (below the last lines of the AK-74u Stats, and "[R6Game.ConfigR6LMGMK46]"
6. Save, and enjoy your new Asault Rifles!
 
     (After all of that, I feel I need to explain the method to my new weapon damage scale. It is based off of the calibre of the rifle, from the 7.62x51mm to the 5.45x39mm round, and everything in between. This leaves tiers of weapon damages!)

TIER-1
Calibre- 7.62x51mm
Damage-78 at 0 meters, 77 at 5 meters, 70 at 20 meters, 60 at 50 meters
Guns- SCAR-H CQC, G3KA4

TIER-2
Calibre- 7.62x39mm
Damage-76 at 0 meters, 75 at 5 meters, 68 at 20 meters, 55 at 50 meters
Guns- AK-47

TIER-3
Calibre- 6.8x43mm
Damage-72 at 0 meters, 71 at 5 meters, 65 at 20 meters, 55 at 50 meters
Guns- M468

TIER-4
Calibre- 5.56x45mm
Damage-65 at 0 meters, 64 at 5 meters, 60 at 20 meters, 50 at 50 meters
Guns- M8, AUG-A3, 552 Commando, G36C, TAR-21, FAMAS-F1, FN-FNC, L85-A2

TIER-5
Calibre- 5.45x39mm
Damage-60 at 0 meters, 59 at 5 meters, 50 at 20 meters, 40 at 50 meters
Guns- AK-74u

If you have any questions about my mod, comments on how you enjoyed it, or concerns about downloading it, simply put your thoughts into the discussion/comments section! Thank you all for your support, and enjoy your new and refined assault rifles!

In reponse to Pluemas-
      Here are those damage scales and assault rifles you were looking for! Hope you enjoy!