The good news is that you do not need to search for parts to build the Pack-a-Punch machine in Revelations. The bad news is that it is carefully hidden in a surprising location. You can scour the entire Black Ops 3 Zombies map as many times as you want, but you will not find it.
Considering that you need the PaP machine to complete the Revelations easter egg, your search might make you frustrated. Worry not though. We will help you find the Pack-a-Punch machine in a few steps below.
Finding the Pack-a-Punch machine in Revelations unlocks the Pack-a-Punch-Ectomy achievement.
Revelations Pack-a-Punch location in BO3 Zombies
The Pack-a-Punch machine is located inside the Apothicon creature in Black Ops 3 Zombies. You need to immobilize it before you can gain access to the machine. The process is fairly straightforward and requires three steps.
Step #1: Activate the Corruption Engines
After spawning, you need to head over to the front area of the temple to find a ritual table. Once there, you need to activate/override one of the four Corruption Engines by spending 500 points.
Once done, you must fend off zombies for about 30 seconds and head inside the newly opened temple entrance. Once inside, interact with the portal which will take you to a new area.
You need to repeat the same process for all four Corruption Engines in Revelations. You can also see your progress by checking the green lights (one for each engine) on the map diagram.
Step #2: Knock the Apothicon down
After activating all four Corruption Engines, you need to head over to Nacht der Untoten and reach the upper area. There is a Control Terminal in the area that you need to interact with.
You can also find the Jug machine on the top floor of Nacht der Untoten
Hit the Activation Terminal to knock the Apothicon unconscious and reveal its mouth. Remember that you need to hit it with electricity to do so.
Interact with the Control Terminal right as the Apothicon is flying by to hit it easily.
Step #3: Reach Apothicon’s abdomen
After you have knocked the Apothicon unconscious, you need to head inside its abdomen via its mouth. Note that if you accidentally hit the abdomen of the Apothicon, you will automatically be teleported out of it.
Once you have reached the abdomen, shoot the yellow orbs inside connecting the heart-type thing to the walls. This will reveal the Pack-a-Punch machine for Revelations. It will drop at a usable location after which you will be able to spend 500 points to PaP your weapons in Zombies Revelations.
How to change the Pack-a-Punch Camo
To change the Pack-a-Punch camo, you must first head over to the Weapon-Switch-Table in Nacht der Untoten and toss your PaP weapon onto it.
When you pick it back up, your weapon will have changed camo for free. Alternatively, you can also Pack a Punch it multiple times to change its camo.