I developed this strategy on my own this wipe ( didn't need last session , so needed to do it now ) , perfected it too that is 100% reliable and all you invest is time , drugs , ammo. There's a way how to always spawn inside the encounter where enclave is and never spawn to close to them , as well it's funny how people do it with a sniper rifle , what a waste of time. Of course never die and in case you don't drop the weapon when reentering the map to always have the first turn before enclave to maximize chances of success. All you need is a character with high AP to loot the dropped weapon and a level capped special sneaker build , witch is quite powerful support even in TB.
Though i don't how to prevent this ... i was laughing with my teammates that the only way would be if you just couldn't find enclave ( they don't exist
) , as there plenty more ways how to farm them , this one is the most efficient ( though not the fastest because , there's a trick with dynamites , but dynamites are limited. )
It doesnt sound easy 
A lot of work...
It is , once you prepared everything the actual time of obtaining x gatling guns is ridiculously fast.
I'm writing this because avenger miniguns and gatling guns should be rare , a high tier item hard to obtain , but it's not. This is not the case , wasn't before and isn't now.
