Location: The CEL-3 Cauterizer can be received at random for free from a 3D Printer in the Outbreak map of the new Exo Zombies mode. You just have to be lucky.
Upgrades: The CEL-3 Cauterizer “wonder weapon” can be upgraded 20 times to Mark 20 (Mk. 20) using the 3D Printer (Mystery Box), which costs 2,500 each time. Along the way as you upgrade it increases your magazine size from 16 to 24 shots! – It’s rumored if you upgrade it fully to Mark 20, you get a Royalty Camo on it from multiplayer.
This video with voice-over tips shows how to unlock the CEL-3 Cauterizer:
AE4 Weapon in Call of Duty: Advanced Warfare Havoc
The AE4 is a fully automatic directed energy assault rifle and its custom weapon variant, the AE4 Widowmaker, combine a versatile firing mechanism with all-around movement speed and handling.
Havoc DLC Bonus Weapon: Season Pass & Havoc DLC owners get access to the Havoc DLC Pack bonus weapons.
Bonus: In the Multiplayer Mode it has unlimited ammo. In the Exo Zombies Mode it’s limited to a 70 magazine size.
1. Red Dot Sight
2. Hybrid Sight
3. Auto Focus Sight
4. Target Enhancer
5. Thermal Scope
6. ACOG Scope
9. Quickdraw Grip
10. Parabolic Microphone
11. Heat Sink
Official demonstration video of the AE4 weapon’s two modes: