Please check Dependencies & Instructions page to see the required addons. Old G3 reloading animation is recommended, the G3 reloading speed is based on old G3 animation: https://modworkshop.net/mydownloads.php?action=view_down&did=22031

New weapon handling demonstration: https://youtu.be/y6Xix-C8GiI
Currently supported mods
https://modworkshop.net/mod/24403 (HK416C Standalone)
https://modworkshop.net/mod/24482 (Vanilla Mod Pack)

Feature: Realistic weapon damage and penetration. (sorted by calibers, barrel length, ammo types to reflect their real-life counterparts)
Realistic magazine capacity and rate of fire
Most weapons are viable on higher difficulties, no more meta
Reworked suppressors, no more damage reduction, instead they increase accuracy and stability
Realistic weapon attachment stats. (magazines capacity, DMR kits, shotgun ammo types, etc)
Reworked scope attachments, they increase accuracy instead of stability
Reworked recoils, the gunplay is much better and more authentic
Shotgun pellets now have damage individually
Bug fixes that fix some guns don't have animation correctly synced to reload time
Realistic shotgun pellet counts based on different calibers

Some recommended mods for more immersions and QOL improvements: 
https://modworkshop.net/mydownloads.php?action=view_down&did=13223 (Repeater sight tweak) 
https://modworkshop.net/mod/30916 (SUB 2000 Fixed sight) (highly recommended) 
https://modworkshop.net/mydownloads.php?action=view_down&did=20142 (Repeater hip fire animation removal)
https://modworkshop.net/mydownloads.php?action=view_down&did=1531 (LMG iron sight, highly recommended)
https://modworkshop.net/mod/36505 (Weapon Texture Reworks)
https://modworkshop.net/mod/17409 (Breaker 12G Fire Anims Switch, delete "boot_recoil_var1.animation" if you don't want to smack your face while hip firing)
https://modworkshop.net/mod/27074 (KSP 58 Belt fix)
https://modworkshop.net/mod/31499 (MG42 belt fix)
https://modworkshop.net/mod/30851 (UMP mag release fix)

Install: Unzip it and put it inside your mods folder.
For more references, please check image section.

The script is based on Blaze Weapon Rebalance, credit goes to him, and I'm using it under his permission. Original Blaze Rebalance mod: https://modworkshop.net/mydownloads.php?action=view_down&did=14311
Weapon description is based on this: https://modworkshop.net/mod/23996
Credit for shotgun pellets damage https://modworkshop.net/mod/27317
Credit for static recoil by Sub https://modworkshop.net/mod/18803