First things first, I want to say that youtube is an incredible resource for learning to modifying any specific Nerf gun. If you would like a specific step by step for a certain gun, that is the place to go.
However, this is the general process for modding a Nerf gun.
- Take the two halves of the gun apart. This can generally be done with a small phillips-head screwdriver.
- Take a picture of the internal pieces. Be careful not to move any of the parts before taking the photo.
- Remove the large spring. Stretch this by about an inch to two inches.
- Replace the spring.
With a revolving barrel gun, follow these steps:
- Pull the back of the barrel apart from the front.
- Each dart slot has a small spring and an air restricter.
- Pull out the air restricter. Cut the center piece out of the rim. Repeat this with every air restricter.
- Replace the air restricters. Throw away the scraps and the small springs.
- Put the gun back together.
With a clip-system gun, follow these steps:
- Identify the air restricter tube. This is easily identified by finding the tube that isn’t part of the plunger system.
- Pull this out and use a drill to break the air restricter out.
- If the air restricter rotates inside its fitting when you drill it, pound it out with a screwdriver.
- Replace the air restricter fitting.
- Put the gun back together.
Note: this doesn’t work with all Nerf guns.