Step 11: Spring Guns - Spring Replacement
Recall from Step 4 that in spring guns, it is the spring that causes the plunger to shoot forward. The plunger is the part of the gun that compresses the air to shoot the dart. So, if the stock spring is replaced with a stronger spring, the plunger will be able to compress the air faster, because there is more force behind the plunger. Although the spring replacement is an effective modification, it does have one drawback: using a stronger spring could cause the barrel to detach from wherever it was glued. However, if you use a strong barrel setup, using a stronger spring should be harmless. Keep in mind though, you do not want to pick a spring that is too strong; there must be limits if you want to keep your barrel from detaching.
Replacing the spring on a gun is very simple. You first must choose your spring. If it is necessary, you must cut down your spring to a length very close to that of the stock spring. A spring should be cut either with bolt cutters, or a Dremel with a cut-off wheel attachment. Other tools might break if used to cut a spring. Once your spring is cut, it is ready to be put in your gun. You can remove the plunger head (usually by unscrewing it) then take out the old spring. You can then put the new spring in its place. Other approaches to spring replacements include adding an extra spring and even stretching the stock spring. However, stretching your spring can cause it to break later, so it is not recommended by experienced Nerfers.