Here is a video I made showing you how to make a H.A.M.P. (High Air pressure Manual Pump) out of PVC. This gun will shoot Nerf darts, slugs, and stefans up to 100 feet. This is a great gun to use at Nerf wars or just in your back yard shooting targets.
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My Youtube channel: http://www.youtube.com/channel/UC8_MbAgA8TzSWumV6b...
Step 1: The Materials You Will Need
A length of yarn
Cutting too ( in my case I used a coping saw)
PVC cement (optional)
You will need to cut a 3" piece from the 2" PVC to connect the elbows together.
2" PVC (The length is up to you I chose to cut a 2ft in piece)
1" PVC (The length is up to you I chose to cut a 1ft 10-1/2 in piece)
Two 2" elbows
1/2" PVC (The length is up to you I chose to cut a 1ft 10in piece)
2" to 1-1/2"
1-1/2" to 1"
1" to 1/2"