
Based on Xclusive Aces Video. Please give it a watch, he does BS free content.
Universal Attachment buffs:
- Rapid Fire: –5% recoil penalty reduction. Rapid Fire now increases recoil less.
- Recoil Springs: +3% recoil improvement. They reduce recoil even more now.
- Ported Compensator: ~+5% buff to recoil control and first-shot accuracy. (Usually the regular Compensator is straight-up better in Zombies, except in some edge cases.)
- Ergonomic Grip & CQB Grip: +5% buff to slide-to-fire and dive-to-fire. You shoot faster after sliding or jumping.
- Fast-Motion Laser: +5% buff to hip-fire accuracy while sliding or jumping. (Does not affect general hip-fire, only while moving.)
Targeted Buffs (Specific Weapons)
- Infiltrator Stock: Increases ADS walking speed on XM4, Model L, GPR-91, PPSH, and SWAT 556.
- Ranger Grip: Sprint-speed buffs on GPR-91, PPSH, and SWAT 556.
- Tactical Laser: Reduces spread on XM4, GPR-91, and C9. (C9 should now be best tac-stance gun)
Indirect Weapon Buffs Through Attachments
- Tanto .22: Better recoil-reducing attachments are available now.
- AK-74: Slightly faster rate of fire with Rapid Fire.
- Model L: Increased damage with the CHF Barrel.
Attachments that got buffs but are mostly useless in Zombies:
- Gain-Twisted Barrel
- Short Barrel
- Lightweight Grip
- Precision Grip
- Combat Stock