Mine was.
Hadn't used it since my last game about 2 weeks ago. Went to test fire since I'm heading out in the morning. No Dice. Motor sounded like
the little engine that could, until I opened it up to find this:
The hex key portion of the tool located in the faux gas block had come loose, and some how made its way down into the spring of my gearbox, causing it to lock back when the motor engaged the gears.
I honestly have no idea how this happened. Thankfully nothing was damaged and I was able to recover the tool and save my gun. The stupid part about this was that the ARL was no help in releasing the spring since the tension was so great. I had to fully open my gearbox to get this sucker out.