# High Speed Blowdart Gun

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So we got an idea from the YouTuber Grant Thompson - "The King of Random" video on how to make a blowdart gun. We made a few variations. We thought that the bullet didn't go fast enough, so we added some pressure with simple, cheap, almost all at home parts, but can still pack over 5x harder than the average human could possibly make, if your not 30 feet underwater. If you like this 'ible, please take the time and click that little 'vote' button on the top right corner of the screen. It helps us out a lot!

FPS: Calculating soon

Average distance: About 87 feet with 20 PSI, results vary depending on PSI of bottle, length of barrel, and bullets.

Here's a video of it in action (Yes, this is slowed down a lot)

PLEASE check out Grant Thompson - "The King of Random"

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## Step 1: Materials

--==[Materials]==--

- 1/2 in x 2 ft of PVC

- PVC Cement

- Coca Cola Bottle (Or any thick plastic bottle)

- Hot glue

- Duct tape (Optional, for decoration)

- 1/2 in PVC ball valve (We used a water valve)

- Pool noodle (Optional, for shoulder rest)

- Sticky notes

- Piece of paper, or party hat

- Tape

- Nail

--==[Tools]==--

- Saw

- Scissors

- Hot glue gun

- Needle nosed pliers

- Bicycle pump

## Step 2: Making the Barrel

The first step is making the barrel. You will need to get your 2 ft length of PVC and cut 9 1/2 inches from one end, and sand as necessary. Next, attach your ball valve to both lengths of PVC. Apply super glue to the longer length of PVC before you put on the valve.

## Step 3: Making the Compression Chamber

Making the compresson chamber is the hardest part, it takes a little bit of patience. First, tip your bottle up side down. In the very center of it, with your hot glue gun on HIGH if it has the setting, melt the center of the bottom. The size will vary depending on the size of your schrader valve. You will want it really snug, so keep the hole smaller than the divit on the side of it. Once you have made your hole, insert your schrader valve in the bottle, and make the stem (long end) go into the hole. Use your needle nose pliers to pull it all the way through. We needed to use olive oil to greese it up and get all the way in. Make sure the schrader valve is secure by its divit.

## Step 4: Making the Ammo

The ammo is pretty easy. First, make a paper cone, and hold it together with some tape of any kind, we used electrical tape because we are too lazy to get regular tape. or you can get a party hat, which we really do recommend, because its sturdier and you don't have to put it together, but the only ones we could find were \$4.00 so we passed. Both methods work. Next, get a sticky note and hold it horizontal to the ground, as shown in the pictures, with a little bit of it sticking out to the left. Move that left part inward and down, then the right part inward and down, to create a cone shape. Next, use some tape (Again, we used electrical tape) to hold it together.

After you have the small sticky note cone done, we need to make it the correct size and cut it. To do this you will need to put the cone on one of your fingers, and push it in firmly into a piece of scrap PVC (Or an end of your barrel), but not so hard that it ruins the cone, and give it a slight twist. Pull it out, and you should see a curved crease. Use your scissors and cut that line.

Now you have that cut piece, we need a weight to balance it, and a nail to stick into trees and cardboard boxes. First what you want to do is put your nail in the hollow part of the cone, and press it down almost all the way, with about 2 cm of nail left in the hollow part. Fill the cone slowly with hot glue, about half way, maby a bit more. Pull the nail downwards a bit more, about 1 cm down, and making sure the nail is straight, let it dry. This can get hot, so you may want to use a cloth towel or napkin to hold it while it fully dries. This can take up to 3 minuets to fully dry. Now your ready to decorate and shoot.

## Step 5: Assembling

To put together the compression chamber and the barrel you first will need to get the long length of PVC, and on the clear end, put a ring of super glue around the tip of the PVC, and insert that in the bottle, not going past the neck of it. We reinforced this with some electrical tape, and to help minimize leakage.

## Step 6: Decorating

Now here's the optional part... DECORATING! We got a few inches of pool noodle and attached it to the super glued pvc length for a nice shoulder pad. We also covered ours with some duct tape to make it look cool. You can really do whatever you want to this.

## Step 7: Firing

Now here's for the part we've all been waiting for... firing the device. A note before you shoot:

This can be dangerous, always use with adult supervision if not an adult already. Never shoot at ANYONE OR ANYTHING that could get hurt or damaged. You may want to wear eye protection, and don't shoot anything less than about 10 feet away. note that 10 is an estimate of the average distance of ricochet, and you may want to change the average depending on how much PSI you have in the bottle.

## Step 8: Doing More

Now you have this blowdart gun 'base' try adding/changing some stuff to it. We have found that using a 2L bottle increases results dramatically, along with changing the barrel size to around 2 feet. Also try making new bullet designs, cone skinnier and longer, less/more hot glue, or multiple nails.

Participated in the
PVC Challenge

Participated in the
Outside Contest

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## 5 Discussions

Thanks. It's always nice to hear that people like my work. No. Make magazine has no official association with Instructables. However, I do work for Make. I create a weekly How-To series for them which is hosted on their YouTube channel. To go along with the videos that I make, I also post the instructions for my projects on websites like Instructables. That is why you see Make videos featured in my instructables.