LOL..good analogy palakaboy!
Being an avid shooter of both cameras and guns, allow me to add:
1) Some missions require a lot of ammo!
..translating that into good batteries and/or battery grips
2) Some missions require you to be able to suppress the enemy with a lot of firepower
....translating into a high FPS rate
3) Some missions require swift reconfigurations of your weapon-system to be able to react to the changing conditions on the battlefied
..translating into a control-scheme (buttons, location of button, intuitiveness of use etc.) that supports fast changes of settings. E.g dedicated buttons for key controls.
4) Some missions require a quick turnaround for repairs - I.e. a comprehensive support structure
...translating into good service-deals/support