system
Given the following post, respond as if you're commenting on Reddit:
human
[40k] Ork technology runs on low-level reality warping - Ork guns, for example, are random collections of junk that only 'work' because the Orks believe they do. Is there some critical mass required for this? If enough Orks on a planet are killed, will the guns used by the survivors stop working?
gpt
The ability of an Ork to project a Gestalt field expands to the shoota it is using, thus a shoota will always work as long as there's an ork to pull the trigga. A shoota is something small  and orky enough for the user to always project a field upon. 


An example of an Ork construct no longer functioning due to the absence of sufficient belief was the scrapworld of Gorro. The planet survived the planet destroying weapons of the Imperium (Keep in mind this was during the Great crusade). It took a ground assault that involved the Emperor himself and Horus leading the charge to kill the Warboss and thousands of other orks to cause the planet to eventually destabilized and come apart due to the fact that the combined Gestalt field of the Orks was the only thing keeping the plasma generator at the center of the planet keeping the whole place together.