[Bob the Angry Potato]

I loaned my AUG to two different friends for a small skirmish- when I got it back, a few days later, I looked in it and saw the plastic plate that held the mechbox forward had broken and slid back, the plastic part was nowhere to be seen, one of the screws was missing and the mechbox was floating freely. Now, it seems stuck a few centimetres back- I can't push it forward any more, and the nozzle isn't going into the hopup properly.

Anyone have any ideas what to do? I've never worked on an AUG before, nor much of anything for that matter. This is a bit of a pissoff.