The Remnant Scavengers.

Equestria fell into a biological civil war centuries ago. Survivors congragatted in highly advanced strongholds, in the middle of the decaying cites known as boneyards. Outside magically enchanted poison from the century old bombs still moves about the land in the form of smog. Bandits, thugs, raiders, cults, and mercenaries wander the land ready to kill and commanded by warlords or thier own greed. So the strongholds stay locked and the ponies stay inside warding off attack and even siege thanks to "Remnants" pieces of restored pre-war technology powered by the princesses' magic stored in canisters of a liquid known as alicorn lithium. But parts and remnants and alicorn lithium are not only rare but is also outside the walls, and the strongholds need them. Enter Ammo, the best Remnant scavenger. Along with his glitchy, bi polar, companion droid Spark and his team of fellow scavengers. He finds whatever you need for a fee. Whether it's guns, boos, expired stims,bullets, Tesla weapons, or even restored companion robots. Ammo finds it, and sells it. But the remnants are running out ,and alicorn lithium is dissappering as well. Then he gets a message from his long dead father showing were he can find "Remnant ark 44" the fabled lost strong hold in filliedelphia. But others want what he's trying to find. It will take all his skill to make it to the end. He will have to dodge assassins, warlords and many other deadly foes as he and his team go from boneyard to boneyard looking for the lost ark of a whole different kind.