A whole lot of information here.

The files I received are more specific than the ones we had access to before.

This is not a full list, I haven't analyzed all the data yet.
All the changes and rest of the info that I can get out of these files will be here soon.

Updates to the topic:
18th Feb.
- Added G3A1 max dmg change
- Categorized accuraccy changes
- Added sniper chest multiplier change
- Added more generic info of attachment changes
- Added shotgun damage changes

1. Damage changes

Assault Rifles:
All assault rifles except G3A1
Min damage 17 -> 18.4 (buff)

G3A1
Min Damage 20 -> 22 (buff)
Max damage 30 -> 34 (buff)

Carbines
SCAR-H
Min Damage 17 -> 20 (buff)

LMGs

M60 & M240B
Max damage 30 -> 34 (buff)
Min damage 20 -> 22 (buff)

PKP
Min damage 20 -> 22 (buff)

M249, M27IAR, RPK-74M
Min damage 17 -> 18.4 (buff)

Sniper rifles

All sniper rifles:
Upper chest damage multiplier 1 -> 1.25 (buff)
Note that all the bolt-action sniper rifles will 1hit kill under distances of 15 meters

M98B
Max damage 95 -> 80 (nerf)
Dropoff start dist. 20 -> 15 (nerf)
Dropoff end dist. 75 -> 120 (buff)

All other bolt-action sniper rifles

Max damage 75 -> 80 (buff)
Min damage 55 -> 59 (buff)
Dropoff start dist. 20 -> 15 (nerf)
Dropoff end dist. 75 -> 100 (buff)

All semiautomatic sniper rifles except SKS:

Min damage: 34 -> 37.5 (buff)
Dropoff start distance 12 -> 15 (buff)

SKS
Dropoff end distance 50 -> 60 (buff)

Shotguns

12g Slug (Auto & Semiauto)
Max damage 50 -> 75 (buff)
Min damage 34 -> 37.5 (buff)
Dropoff start dist. 8 -> 15 (buff)
Dropoff end dist. 40 -> 50 (buff)

12g Slug (Pump-action)Min damage 34 -> 37.5 (buff)
Dropoff start dist. 8 -> 15 (buff)
Dropoff end dist. 40 -> 50 (buff)

12g Frag (Auto & Semiauto)
Some weird things in the files, not 100% sure about frags yet.
Looks like only the min direct damage is reduced from 10 to 5

12g Frag (Pump-action)
Max direct hit damage 60 -> 67 (buff)
Blast damage 30 -> 40 (buff)

12g Buckshot
Max damage 20 -> 12.5 (nerf)
Dropoff start dist. 4 -> 8 (buff)
Dropoff end dist. 25 -> 30 (buff)

12g Flechette
Max damage 14.3 -> 11.2 (nerf)
Min damage 8.4 -> 8 (nerf)
Dropoff start dist. 12 -> 15 (buff)
Dropoff end dist. 25 -> 30 (buff)

2. Attachments

Fore grip
Basically before it reduced the horizontal recoil by 50%, in these files it reduces h-recoil only ~20-33% depending on weapon.
It also increases the minimum spread 20% ~ 50% depending on stance and weapon.


Suppressor
Suppressors will not reduce the damage anymore.
Now it will reduce the distance where damage starts/stops to drop off instead.
For most weapons it will decrease the min spread by 25% instead of 50%
Although looks like M60 will still have the same 50% effect.


Heavy barrel
For most of the weapons it decreases ADS min spread by 75 or 50% depending on weapon.
Recoil is still increased by 10 or 15% and HIP min spread by 20-25% depending on weapon.

It doesn't make AN94 100% accurate anymore while aiming down the sight.
Reduces ADS min spread by 75% and only increases recoil by 10%, the hip fire penalty is 20% for AN94
G3A1 is same than AN94 except heavy barrel increases recoil 6.7% and hip fire is increased only 14.3%

For few weapons it also makes Spread increase per shot 10% higher.

It will also increase drop-off end distance by 50% making weapons more deadly at ranges between 50m and 90m, depending on weapon.

Flash suppressor
Will decrease recoil by 17 ~ 25% depending on weapon.
For most weapons it increases hip min spread by 20~25% but some weapons don't have any hip accuracy penalty.


Extended magazine
There seems to be extended magazine for AS VAL which didn't exist before.
With ext mag it will have 30 bullets in a mag instead of 20


I'll have complete list of all these soon


3. Accuracy changes

Assault rifles

AEK971
ADS Min Spread, Not moving 0.2 -> 0.4 (nerf)
Recoil right 0.5 -> 0.3 (buff)

AK74M
Recoil up 0.3 -> 0.28 (buff)
FirstSRecoilMul 2 -> 1.5 (buff)

AN94
Recoil up 0.45 -> 0.3 (buff)
FirstSRecoilMul 1.5 -> 2 (nerf)

F2000
Recoil up 0.3 -> 0.26 (buff)

FAMAS
Recoil left 0.6 -> 0.35 (buff)
Recoil right 0.6 -> 0.5 (buff)
Recoil decrease 15 -> 18 (buff)
FirstSRecoilMul 2 -> 2.6 (nerf)

G3A1
Recoil up 0.55 -> 0.45 (buff)
FirstSRecoilMul 1.2 -> 1.8 (nerf)

L85A2
Recoil left 0.4 -> 0.3 (buff)
Recoil decrease 22 -> 18 (nerf)
Min spread, ADS, not moving 0.4 -> 0.2 (buff)

M416
FirstSRecoilMul 2 -> 2.4 (nerf)

Carbines

AKS74u
Recoil up 0.3 -> 0.28 (buff)
FirstSRecoilMul 2 -> 2.2 (nerf)

HK53
Recoil up 0.3 -> 0.28 (buff)
Recoil left 0.3 -> 0.2 (buff)
Recoil right 0.5 -> 0.35 (buff)
Recoil decrease 22 -> 18 (nerf)

SCAR-H
Recoil decrease 15 -> 13 (buff)

SG553
Recoil up 0.3 -> 0.25 (buff)
FirstSRecoilMul 2.5 -> 2.2 (buff)

QBZ-95B
Recoil left 0.5 -> 0.335 (buff)
Recoil right 0.5 -> 0.335 (buff)
Recoil decrease 22 -> 18 (nerf)
Min spread, ADS, not moving 0.4 -> 0.5 (nerf)

LMGs

M240
FirstSRecoilMul 1 -> 1.7 (buff)

M249
FirstSRecoilMul 1 -> 2.2 (nerf)
Recoil decrease 15 -> 12 (nerf)

M60
FirstSRecoilMul 2 -> 1.5 (buff)

MG36
Recoil decrease 15 -> 13 (nerf)
FirstSRecoilMul 1 -> 1.8 (nerf)

PKP
Recoil up 0.75 -> 0.65 (buff)
Recoil decrease 7 -> 13 (buff)
FirstSRecoilMul 1 -> 1.5 (nerf)
Max spread, ADS, not moving 1 -> 3 (nerf)

Type88
Recoil left 0.4 -> 0.3 (buff)
Recoil right 0.4 -> 0.3 (buff)
Recoil decrease 15 -> 12 (nerf)
FirstSRecoilMul 1.34 -> 1.5 (nerf)

RPK
Recoil decrease 15 -> 13 (nerf)
FirstSRecoilMul 2 -> 1.8 (buff)

QBB-95
Recoil up 0.45 -> 0.37 (buff)
Recoil left 0.1 -> 0.4 (nerf)
Recoil right 0.3 -> 0.4 (nerf)
FirstSRecoilMul 1 -> 2 (nerf)
Recoil decrease 15 -> 13 (nerf)

PDWs

AS VAL
Recoil left 0.2 -> 0.25 (nerf)
Recoil right 0.3 -> 0.45 (nerf)
Recoil decrease 22 -> 18 (nerf)

PDW-R
Recoil decrease 22 -> 18 (nerf)
FirstSRecoilMul 2.5 -> 2 (nerf)
Min spread, ADS, not moving 0.4 -> 0.5 (nerf)
Min spread, ADS, moving 0.6 -> 0.8 (nerf)
Min spread, HIP, not moving
^ Standing 1.5 -> 2 (nerf)
^ Crouching 1 -> 1.5 (nerf)
^ Prone 0.75 -> 1 (nerf)
Min spread, HIP, moving
^ Standing 2 -> 2.5 (nerf)
^ Crouching 1.5 -> 2 (nerf)
^ Prone 1.25 -> 1.5 (nerf)

MP7
Min spread, HIP, not moving, prone & crouching 0.75 -> 1.2 (nerf)
Min spread, HIP,moving, prone & crouching 1.25 -> 1.5 (nerf)

P90
Min spread, HIP, not moving, prone & crouching 0.75 -> 1.2 (nerf)
Min spread, HIP,moving, prone & crouching 1.25 -> 1.5 (nerf)

PP-19
Recoil decrease 25 -> 20 (nerf)
FirstSRecoilMul 2.5 -> 2 (nerf)
Min spread, HIP, not moving, prone & crouching 0.75 -> 1.2 (nerf)
Min spread, HIP,moving, prone & crouching 1.25 -> 1.5 (nerf)

PP2000
Min spread, HIP, not moving, prone & crouching 0.75 -> 1.2 (nerf)
Min spread, HIP,moving, prone & crouching 1.25 -> 1.5 (nerf)

UMP45
Min spread, HIP, not moving, prone & crouching 0.75 -> 1.2 (nerf)
Min spread, HIP,moving, prone & crouching 1.25 -> 1.5 (nerf)

Pistols

G18
Recoil up 0.7 -> 0.5 (buff)

M9
RecoilDecrease 15 -> 30 (buff)

M93R
Recoil up 0.5 -> 0.4 (buff)
Recoil left 0.4 -> 0.2 (buff)
Recoil right 0.4 -> 0.2 (buff)
FirstSRecoilMul 2.5 -> 2 (buff)

.44 Magnum
Spread increase 0.6 -> 0.3 (buff)
I haven't played the game in a while to know what is what, but they are making changes for the better it seems.

Sources:
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