system
Given the following post, respond as if you're commenting on Reddit:
human
[Doom]Where on earth does Doomguy carry his huge arsenal?

I hope it’s not where I think he’s carrying it...
gpt
Weapons that fold down to make them easier for transportation, plus some localized teleportation technology.

Or he summons them with his anger, like an extremely pissed off wizard. It... might explain why ripping a demon apart with his bare hands may turn their blood into bullets and healing items.