It would be cool if we had an add-on that was like a backpack, but when you left-clicked the mouse (or whatever you have "fire weapons" set to), the backpack would deploy into a stationary turret. Obviously, this wouldn't happen instantaniousy, you'd have to wait a few seconds. But it would be awesome for defensive purposes and would be freeking awesome! I'm not so sure how possible it would be, but if you can do it, please just don't TELL me HOW to do it, and DO it!!