This is a very fun way to play paintball without all the paint. These guns are easy to make and require few materials.

Step 1: The Materials

You Need:

-1 1/2 inch ABS pipe (About 18 inches long)

-sports water bottle with soft collapsible sides

-1 1/2 inch to 2 1/2 inch ABS adapter

-ABS cement

-Ping pong ball
(Every material listed can be found at a plumbing/hardware store except for the ping pong ball and the water bottle.)

Step 2: How to Put the Gun Together

#1 Start out by cutting your ABS pipe down to 18 inches (if not done already).

#2 get your ABS Adapter and your ABS Pipe. Put the Cement onto the end of the pipe and the small end of the Adapter. Then stick the pipe into the small end of the adapter. (When done this step, leave your product out to dry for 10 min.)

#3 Next, cement the large end of the adapter onto the threaded part of the water bottle. (If the water bottle does not fit into the adapter cut
Vertical slots into the threaded part of the bottle to increase collapsibility)

#4 Now let your gun dry for about 30 minutes, then it's ready for use!

Step 3: How to Use the Gun

Put a ping pong ball about a fingers distance down the front end of the ABS pipe. Then smack the water bottle with your hand and watch the ball FLY!!!