The screws on the stock are a different size than those on the rest of the gun, so make sure to keep them separate to make it easier when you put the gun back together.
In order to remove this piece, you will have to remove the internal screw located directly to the lower right corner of the larger cylinder of the plunger tube. Once you have removed this main piece, cut off the black rectangular piece of plastic that is connected loosely to the thinner cylinder.
Find the piece of plastic that holds that spring that you took out and put aside earlier. Unscrew the end so that you can remove the spring. Take off the spring and replace it with a more powerful spring. Then screw the end back on to hold the spring in place. Note that you can add multiple springs off different strengths, as shown here: http://www. youtube. com/watch?v=7tv2KvWjD0w.
Before closing the gun, make sure that the plunger tube lines up correctly with the barrel.
