Firstly thank you so much for downloading it and giving me feedback. The AI system is not amazing it is very simple as this is my first time using Unreal Engine 4, so I am sure their will be little bugs here and their. I'll make sure to revise my AI system in my next project. In regards to it taking two minutes for the AI to kill you that will because of the AI difficulty. The AI will progressively get stronger and deal more damage. So I would imagine you were on a fairly low wave for that to be the case. You will find a ammo box spawning in one of the corners of the bunker. You can run over the ammo and replenish your ammo supply. I understand you wanted more with a game being a gigabyte but this was my first project on Unreal Engine 4 and my game development skills are not amazing. I hope this response has cleared things up for you and once again thank you for playing my game. :)