Have you ever had your gearbox lock up without warning?
It's certainly a frustrating problem, as no one wants their gun to simply stop functioning in the middle of a firefight! Not all gearbox lock ups are created equal, but many of them are caused by either a weak battery, rapid pulling of the trigger on semi auto, or a combination of the two. The culprit of this behavior is one part in particular:
The cutoff lever.
This component is designed to reset the trigger shuttle as soon as a cycle has been completed on semi auto. If the cycle does not complete fully, then the cutoff lever can get stuck against the trigger shuttle and therefore make pulling the trigger do nothing on your gun. In order to solve this issue, simply flip your gun to full auto and it's ready to go! By flipping the selector to full, you are manually moving the cutoff lever which allows the trigger shuttle to reset and this will unlock your gearbox.
If you'd like to prevent this issue from happening in the first place, you can go right to the root by getting a more powerful battery and a stronger motor. These parts will make your gearbox cycle quicker, and will greatly reduce the chance of it getting locked up on semi auto. Alternatively, you could radius the front of the cutoff lever in order to make it more rounded, and this will make it much harder for the trigger shuttle to get stuck against it.
So before assuming your gun is completely broken, be sure to flip it to full auto and try shooting again. Hopefully this tip saves you some headache and money!