Introduction: How to Build Speargun for Less Than $10

Picture of How to Build Speargun for Less Than $10

Simple, Cheap, and Effective Hawaiian style spearfishing gun.

Step 1: Materials

Picture of Materials

2 ft Rubber Surgical grade Tubing or Exercise bands ($3-5)
Small Section of PVC 1/2in - 1in in Diameter ($2)
1 Youth Arrow with safety tip ($3)
4 - Zip ties (.50)

Total cost for these materials should be less than 10 bucks, if not free. All these things are pretty easy to find.

Step 2: Assembly

Picture of Assembly

Take both ends of the rubber tubbing and place each side evenly onto the PVC pipe. Once in place tighten a zip tie around the the rubber tubbing and PVC, leave around a 1/2 inch of rubber tubbing at the end. Now fold the tubbing back and place another zip tie. This should hold everything nicely in place. I added a few more zip ties toward the top of the PVC, just for good measure.

Step 3: Testing

Picture of Testing

Dry fire it a few times before you add the arrow. It will work similar to a sling shot holding the tail of the arrow in the center of the rubber tubing. Draw back and then release.


Please be safe!! I have a one eyed uncle that can testify to the fact that arrows are dangerous.

Comments

cazlab (author)2016-01-25

this is not a speargun.
it is a hawaiin sling.
we don't call machetes pocket knives or scooters motorcycles or gliders airplanes.
this community has gotten pretty fast and loose with what words mean over the last couple of years.

BakerV (author)cazlab2016-07-26

If you are wondering, a hawian sling was called a speargun before losers added a trigger

JonathanH14 (author)2015-08-06

This is a good basic concept for an antenna launcher--radio operators use it to put a line high on a tree branch, then pull up the antenna wire. The advantage to this small design is portability. Instead of arrows, one would use a weighted blunt dowel, or perhaps some sort of arrow. I also wonder why such a large diameter piece of PVC was used--but it would allow a better grip, I suppose. Anyway, a good start for something useful.

mwhit13 (author)2013-08-14

Why the 1" pipe? the hole through you handle should barely be bigger than the diameter of your spear shaft for accuracy reasons.

Just curious. at least theres one Hawaiian sling on here.

cybercoho72 (author)2011-10-16

these have been around for at least fifty years, probaly longer. they are called a Hawaiian swing and shoot spears that are about 8 feet long underwater for fish. i know i have an original one that was made back in the fiftys. so i would suggest that know one use these on land. very unacurate and you could hurt someone.

bubba j (author)2009-10-28

sorry could get sued

bubba j (author)2009-10-28

what do you think this could take out
 
you coul get sued if you don't add I AM NOT RESPONIPLE FOR WHAT YOU DO WITH THIS SPEAR SHOOTER so some one dosn't shoot thier neibors cat 

About This Instructable

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Bio: Maker of things. Small business builder. Follow my latest project on Twitter @joe_murphy
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