Mode add automatic guns applyable to equipment grid. Mode was originaly contained in Coal Powered mode and was extracted because of possible complexity.
Mods introducing new content into the game.
New ways to deal with enemies, be it attack or defense.
These guns do not work if they are placed into a car without a driver. For example, personal laser turrets work in cars without a driver.
EDIT: it does not work in AI cars without a driver (AAI mod - https://mods.factorio.com/mod/aai-programmable-vehicles ) Works in the Spidertron
I'll try to look on this topic, but for now I do not have any map, where I could directly test it.
This issue may be solved in same change with: https://mods.factorio.com/mod/GunEquipment/discussion/62537faecbc31b1746a5641b