If the gun does not fire there may be two reasons, (1) the trigger pin is not pushing the firing lever up far enough; solution: in the trigger there is a hole where you can adust the height of the trigger pin (using a small flathead screwdriver), turn it clockwise to raise the height and see if you get the gun to fire. Try this a couple of time to see if you can get the gun to fire.
(2) The second reason is that the trigger pin is out of alignment with the firing lever, this would mean you would have to realign the firing pin. This involves stripping down the gun and aligning the trigger pin and firing lever.
Hope this helps!
