ExtraWeaponCustomization

Adds additional gun mechanics for rundown developers to use. These include:

Ammo Mod: Modifies the magazine/reserve ammo counts.
Damage Mod: Applies a damage modifier.
Damage Mod Per Target: Applies a damage modifier unique to each target. [On Hit, On Damage]
Damage Over Time: Applies a damage over time effect. [On Hit]
Explosive: Causes explosions where bullets land. [Bullets fired only]
Fire Rate Mod: Applies a fire rate modifier.
Health Mod: Modifies the user's health.
Recoil Mod: Applies a recoil modifier.

Accelerate: Fire rate and/or damage changes with continuous fire.
Ammopack Refill: Specify the % of reserves ammopacks refill.
Auto Aim: Automatically fire toward targets.
Auto Trigger: Hold the trigger to fire. [Semi or Burst weapons only]
Enforce Fire Rate: Increases damage/ammo cost when FPS is lower than fire rate. [Automatic weapons only]
Hold Burst: Releasing the trigger ends a burst early. [Burst weapons only]
Reserve Clip: Combines reserve ammo with the magazine.

Additional details for customizing/implementing these can be found on the wiki:

Wiki

Note: Doesn't seem to work well on Bots.

Features & Adjustments

New effect: Recoil Mod
- Applies a recoil modifier when triggered.
Ammo Mod
- Added field "Overflow To Reserve": Excess ammo changes in the clip overflow to reserve ammo. On by default.
Trigger Type
- Added type "On Wield": Triggers when swapping to the weapon.
Misc
- Added compatibility with GTFuckingXP

Bug Fixes

Misc
- Fixed burst weapons having no burst delay if they had no fire rate modifiers.

Located in mod files.