Introduction: How to Make a Spring Powered Paintball Gun

Picture of How to Make a Spring Powered Paintball Gun

In this Instructable, I will show you how to make a spring powered gun that can shoot paintballs, rocks, etc.
**I TAKE NO RESPONSIBILITY FOR WHAT YOU DO WITH THE INFORMATION PROVIDED IN THIS INSTRUCTABLE**

Step 1: Materials

Picture of Materials

5 foot piece of PVC (3/4 inch)
1 foot piece of PVC (1/2 inch)
PVC cutter or Hacksaw
3/4 inch T Joint
3/4 inch end caps (x3)
Strong, long spring (see picture)
Stubby, weak spring (see picture)
Balsa wood (or Bass, Poplar, etc.)
Electrical tape
Drill+ Bits
Chisel
Nail (one only)
Airsoft 20mm rails (Optional)
Airsoft Red Dot Scope (Optional)

Step 2: Body Assembly

Picture of Body Assembly

Cut the 3/4 inch PVC to the following lengths-
Barrel- 45 cm (or whatever length you want it to be)
Magazine- The length of your SHORT spring minus 0.5 cm.
Stock- Length of your LONG spring plus 2.5 cm

Cut the 1/2 inch PVC-
Piston- 6 cm

Step 3: Magazine

Picture of Magazine

1. To make the magazine, Cap the previously cut PVC.
2. Cut your wood into a Circle that will fit into the PVC snugly.
3. Tape the wood to the top of the spring.
4. Insert the spring into the magazine, wood on top.

Step 4: Operating Spring

Picture of Operating Spring

1. Tape the "Piston" (1/2 inch PVC) to the Long spring.
2. Drill a hole all the way through the bottom of the piston (see picture).
BE SURE TO PUT FOAM/SOMETHING SOFT ON THE TOP, SO IT DOESN'T BREAK THE PAINTBALL IN THE BARREL.

Step 5: Stock

Picture of Stock

First, draw your grove (for the nail to stick out of)
Then, draw the notch (to lock the spring back.)
I have 2 notches, one for hight velocity and the other for medium velocity.
Depending on the strength of your spring, the size of your groove will vary.

Now, here is the hard part- cutting out the groove.
I drilled it out and then cleaned it with a chisel (Picture 2), instead of cutting it (it was much easier).

Then, drill a Large hole in the back (Picture 3).
Now, put the spring with the piston into the stock.
Push it down a little bit and push the nail through the hole and the hole in the piston (Picture 4).
Picture 5 is the final result (of the Stock).

Step 6: End

Picture of End

Now, reassemble the gun and, you're ready to go.

Comments

shorty89 (author)2015-10-27

I actually did this in reverse order. I was at ACE, wondering what I might need for my next project and I found sooo many springs! So obviously, I bought over $30 just in springs :D . I've always wanted to do a spring-powered project, but salvaging them out of pens is always a hassle because they're rarely standard. Thanks for the instructable, now I get to use my springs!

Philbil (author)2009-08-28

Where'd you find the springs?

hobbitboy (author)Philbil2010-12-16

I got mine frome 2 nerf recons By the way i used the lighets from the recon and made mine into a nerf snipir but can double as a airsoft bazzoka
Skaterqwertyuiop awsome ible

Thanks man, really appreciate it.

temp (author)2009-11-03

you should add a trigger

hobbitboy (author)temp2010-12-16

if you look at the metal denting version by camdav32 it has a triger and is very similare to this one

dkop1 (author)2010-10-21

wow, sounds like one BA project for a few hours on a Saturday.

the "wow shammy" (author)2009-08-03

how far does it shoot?

It depends on which springs you use and, how far back you cock the gun.

EmmettO (author)skaterqwertyuiop2010-06-14

So what's the best range you've gotten out of this set up? Not how far the paintball will go, how far away can you fire and actually mark a target?

skaterqwertyuiop (author)EmmettO2010-06-14

Sorry, but I have never used it in a match or even for long range target practice (I've been successful for 50ft, but haven't tried further). It also depends on the spring, etc. as stated above.

EmmettO (author)skaterqwertyuiop2010-06-15

Not bad for a spring! I would have thought you would have to pull it back further than the four or five inches to get a really good push. In addition to paintballs, this could also work with nerf microdarts. I think the regular ones would just mush in the barrel.

~teknoarsonist~ (author)2010-05-22

 Nice stuff! i thought about this and figured id try so i searched it and ive been using yours as a general guide! Thanks! subscribe to me and ill have some pics of it up soon!

firefighter1333 (author)2009-10-30

how far does YOURS shoot?

samdaman (author)2009-08-04

did it cost much to make and where can i get the scope from. nice job by the way

It cost around $8 (excluding the scope). I got the scope from www.evike.com , when i bought my JG/KS P90 airsoft gun. Thanks.

the "wow shammy" (author)2009-08-03

where can i get the springs? (this looks awesome!)

The ACE hardware store (if you live in the USA)

thanks alot!!!

Oh, if you plan on making it, be sure to put a blow dampener (like a cottonball) on the end of the piston, so it doesn't break the paintballs in the barrel.

About This Instructable

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Bio: Young and creative kid turned mechanical engineering student at University of Pittsburgh. All posts here were posted when I was in highschool. New projects coming ... More »
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