An easy way to complete this challenge is to stay on a lower circular platform near the ammo vendor. Top deck above provides complete cover from all incoming fire and the ammo vendor can be used to quickly restock. About the only concern would be random loaders from a nearby spawn point so one should always keep an eye on it. Weapons with large splash damage or spread should not be used in order to avoid accidental hits or damage to auto cannons. Precision weapons such as sniper rifles should bee used instead.
- The auto cannons that spawn around the upper level of The Bunker during Where Angels Fear To Tread have no bearing on this challenge.