Endless Hunger - Overdrive Crossfire Grillmeister - Zombie Gunship Survival

The GH-52 Grillmeister Napalm Cannon is great for this event. Ammo is 16, is replenished after 25 kills, so many hellhounds and impalers caught in the flames replenishes the ammo.
25 mission done, and the result, one rare M777, better luck next week.