system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40K] How do power weapons and chain weapons actually work?
gpt
Power Weapons generate a disruptive energy field micrometers from the surface of the weapon that disrupts the atomic bonds of matter it comes into contact with. The system also generates a substantial amount of heat. This combines to atomically and structurally weaken any material it struck, allowing the weapon to basically cut through anything.

Chain weapons work like... well... chainsaws. However, they don't operate on gears, but rather magnetic rails. Well, most of them. Orks just use whatever is around.