Introduction: How to Make a Paintball Silencer

Picture of How to Make a Paintball Silencer

####I am not responsible for any injuries deaths or felonies you cause with this device.#######

Well, I basically took this idea and ran with it.
I updated it and fixed where he left off. It works well and its fairly light depending on what kind of PVC you use.


Picture of THE GOODS

*1* Pocket knife

*2* PVC slightly larger than your barrel

*3* PVC 1" larger than your barrel

*4* 2 PVC reducers that fit your PVC

*5* Drill with a dremel bit

*6* Paintball marker

*7* Cotton balls

*8* Black plastic spray paint

*9* Sand paper

*10* Hammer

*11* PVC cutter

*12* Hacksaw

Step 2: ASSEMBLING (part One)

Picture of ASSEMBLING (part One)

Take your pocket knife and cut out that tiny ridge that keeps the pipe from going deeper into the reducer. Next, take the hammer and knock the reducer a good distance down the pipe. When you get the perfect position, move on to the next step.

Step 3: ASSEMBLING (part 2)

Picture of ASSEMBLING (part 2)

Firmly grasp your PVC Cutter and begin cutting the tube about 1" from the reducer. Make sure it is as straight as it can be, if not it will affect your accuracy.

Step 4: ASSEMBLING (part 3)

Picture of ASSEMBLING (part 3)

Take the drill and equip the smallest bit possible. Now, take the pipe and remove it from the reducer. Next, CAREFULLY drill about ten holes in a straight line, twist the PVC and repeat. Do this about six times.

*as I said before, be very careful when making the holes, our bit broke and sent a tiny peice of metal hurdling towards me and stuck in my arm.*


Picture of SANDING

Take your sandpaper and wrap it around a stick. Shove the pipe over it. Move the stick up and down thus sanding the inside of the pipe.

Step 6: Cutting the Pipe, Again

Picture of Cutting the Pipe, Again

Measure the larger pipe and cut it slightly shorter than the smaller pipe in the reducer. If it is too big pull the reducer further back on the smaller pipe, if its too small, vice-versa.

Step 7: Stuffing

Picture of Stuffing

Take about 20 cotton balls and tear them in half. Then shove them between the two pipes by any means necessary.

Step 8: Painting

Picture of Painting

Take the silencer and put the second reducer on it. Then, put it on a stick and paint it black. Let it sit overnight then WHAM-MO! you have a beautiful silencer.


Norfolkson (author)2017-12-01

This is a "silencer" for a paint ball marker, NOT a firearm, as far as I know there aren't any laws anywhere governing the silencer for this use. Why should there be? Besides, paint ball markers are pretty damn quite anyway.

Hartk (author)2017-07-25

are silences allowed in Australia?

Joshua_D_Baxter (author)2015-10-30

In South Africa silencers are 100% legal and therefore I thank you kindly for posting this build, I shal be making one as soon as possible

APDoty (author)2015-05-27

You sheeple need to learn to read our laws.

Making of a silencer by an unlicensed person for personal use does not require any license or notification to ATF under the GCA. However, under the NFA the making of a silencer must be approved in advance by ATF. Unlicensed persons must file an ATF Form 1, Application to Make a Firearm, pay a $200 making tax, and comply with all other provisions of the law prior to making the firearm. Approval of the Form 1 results in registration of the silencer to the maker. Subsequent transfers of the registered silencer must be approved in advance by ATF. Possession of a silencer not registered to the possessor, and a making or transfer that does not comply with the NFA and regulations are punishable by imprisonment for up to 10 years, a fine of $250,000, or both.
Held, a device for an unregulated paintball gun, having a permanently affixed, integral ported barrel and other components, that functions to reduce the report of the paintball gun is not a “firearm silencer” or “firearm muffler” as defined, as the device is not one for diminishing the report of a portable firearm.
Held further, removal of the permanently affixed ported barrel and other components from a paintball gun is a “making” of a silencer under the GCA and NFA that requires advance approval from ATF.

Straight from the article quoted earlier.

1. Silencers ARE NOT ILLEGAL!

ANYONE can make a silencer! (provided that they can legally own a firearm)

You DO have to fill out the maker form and pay the NFA item maker tax ($200), though, or you have violated federal law.

2. Silencers are devices that diminish the report of a portable firearm.

Only weapons that are "integrally suppressed" use vent holes in the barrel for silencers. These weapons are much less effective at longer range because the gas pushing the projectile down the barrel is vented off before the bullet leaves the barrel, but they are shorter than weapons with "can" style screw on silencers and easy to maneuver indoors.

A "can" style silencer screws onto a threaded barrel, or an adapter that is threaded and clamps onto a barrel. These silencers use baffles AND expansion chambers (like the one in this build) to diminish the report of a portable firearm.

3. Silencers don't make guns silent.

They contain the "explosion" that comes out of the barrel immediately after the bullet, but that boom isn't the only thing going on out there. The bullet makes a loud crack when it leaves the barrel because it breaks the sound barrier. Using subsonic ammunition (it leaves the barrel moving slower than the speed of sound) will alleviate this miniature "sonic boom". These rounds are less affective at long range but work fine in close quarters. All that being said, a subsonic round from a 10/22 with a silencer is EXTREMELY quiet, but still not silent, and a 300BLK AR-15 with subsonic ammo, silenced, is about half as loud as an unsilenced 10/22 with regular supersonic ammo.

People, we carry the greatest archive of knowledge ever composed (Google) around in our pockets 24 hours a day. Use it!

imducky98 (author)2015-02-04

i found 8 airsoft BB's XD

TheZacmann (author)2014-05-31

a silencer is only illegal if it can be connected to a real firearm that you own, so if that is so, then if it is permantly attached or, will be damaged by removing it, then will be legal. I've made my own from the plastic of a ribbon spindle a pill bottle and some random metal scraps.

Darkfighter101 (author)2013-01-27

Unluckily for all you people talking about how this is ilegal this conts as supressing for a air cannon based weapon (when using hpa tank) or supresing for a co2 expansion weapon and is completly legal do to how its designed and made

ilpug (author)2012-05-02

All the legality arguments aside, this is a paintball gun.
Real silencers use vented barrels and a system of baffles.
The attached cross-section design is a much more efficient design than what you used, and will work better and take up less space, as it can be extended back along the barrel in order to save space. It can also be a smaller diameter of pipe than what you used. Go grab a cheap barrel some time and see if this design works better. I reccomend using a cheap barrel because you have to drill a lot of vent holes in the barrel itself. This is kind of a non-removable design, so it is more of a silenced barrel variation. Note the slanted inward front- that helps it catch as much escaping gas as possible.

rogerdemin (author)ilpug2012-05-13

How many suppressors do you own?

A suppressor is under federal law is a FIREARM. If you make one even for a paintball marker you risk major fines and 10 years in jail.

Atf rulings right here for you who think they know the law.

Unless you have a letter form the ATF saying your design is NOT a NFA item OR you have a form 1 or form 4 for the item then your gonna go to JAIL when caught.

ilpug (author)rogerdemin2012-05-13

I was aware that they were illegal, but I had not read the actual literature on that. Thanks for the link.

I used to own a silencer I made for an Airsoft pistol that I saw on this site, from cheap plastic pipe. Frankly, I don't care. I am aware of the law, and I am aware that it applies to me, and I am further aware of the fact that if I am caught I will be punished. I am also aware that some people may think less of me for making a silencer for a low-powered Airsoft gun. Still don't care.

Thank you for your concern. If the above graphic is illegal or needs to be censored, by all means flag it. Just consider the fact that there are many websites where you can find fully detailed instructions on how to silence all kinds of real firearms effectively. I have seen many movies that also show methods of silencing guns, there for any person to see. The above graphic is something that I thought up in about two minutes and drew on MS paint. I did it for the benefit of paintballers who want a silencer.

Also, thanks for your double post, but I heard you the first time.

rogerdemin (author)ilpug2012-05-13

How many suppressors do you own?

A suppressor is under federal law is a FIREARM. If you make one even for a paintball marker you risk major fines and 10 years in jail.

Atf rulings right here for you who think they know the law.

Unless you have a letter form the ATF saying your design is NOT a NFA item OR you have a form 1 or form 4 for the item then your gonna go to JAIL when caught.

NInja99 (author)2009-03-12

A real silencer has holes in in it. =]

ilpug (author)NInja992012-05-02

A real silencer does not have to have holes in it. Depending on the design, there may be vent holes in the barrel, or not. Usually silencers use baffles to catch escaping gas.

MrAngryPants (author)NInja992009-03-12

Step four, I drilled holes into the inner wall of the suppressor.

NInja99 (author)MrAngryPants2009-03-12

but the picture at the beginning and end doesnt look like theres holes in it

MrAngryPants (author)NInja992009-03-14

The holes are on the inner wall. that way the outgoing gas can escape through the holes and disperse through the cotton.

rotinom (author)2008-07-08

Just as an FYI, if you live in the US, these are (generally) not permitted. You'll need to get a Class 3 tax stamp, pay $250 to register it, get permission from your local police department, etc.. This is because it is essentially no different from a silencer for a real firearm. Just something to be aware of, because it's a federal crime. Felony. Bad business all around. Otherwise, nice work. I'm assuming that the PVC pieces were not glued together, because otherwise splatter & everything would be a royal pain to get out. Also, you'll need to replace the cotton balls every so often. You may want to try very fine mesh steel or stainless steel wool, and check the performance. It'll be a bit more durable, but you will have the rust issue to contend with.

120012 (author)rotinom2010-05-15

 exactlly : FIREARM is considered anything that uses a primer and a flammable source to push a object out of a barrel like an air rifle they have silencers that work on them but no tax stamp. SO THERE FORE THIS IS LEGAL.

Steam Powered (author)1200122010-07-09

and Co2 isn't flammible? okay, go throw some cans in a fire and watch from a safe distance with barriers around the fire, co2 is very flammable in the form used in paintball, and its explosive as all heck

ilpug (author)Steam Powered2012-05-02

CO2 is what is used in FIRE EXTINGUISHERS.

Co2 it self is NOT flammable it has no oxegen in it wich fire needs to live so there for Co2 would put the fire out it is the fact that the canisters are pressurised ...and a FIRARM means anythin that uses a primer and a flammable source W/ Combution in the chamber. to expel a projectile

Well, CO2 has oxygen in it, however a chemical reaction would have to take place to release the O from the C

wow ok then....ummm i'm pretty sure your referring to an occasion where you put a paintbal CO2 cylinder in a campfire. If it blew then it wouldn't be because the co2 burned but where the gas molecules got all excited from the heat and the pressure became to much. immediately after the blast the fire probably died down, right?

kutz (author)Steam Powered2010-09-01

dear jeezus lord CO2 ISNT FLAMMABLE xD

lol Co2 is used in fire extinguishers. :\

iriyejm (author)1200122010-10-05

Sorry; It's the device not the "weapon" it's attached to.
possession of the silencer it's self is the element of the crime.

Rotinom is correct, if this paintball suppressor can reduce the sound by even a decibel it is illegal to build in the US, if you do build this you are playing with some bad Mojo. Now its not illegal to have all the materials and plans for building a suppressor (depending on your local laws). You can even buy real firearm suppressor kits without having to pay the $250 tax stamp and getting your LEO to sign off, as long as you do not assemble the kit (or materials for a homemade suppressor). The moment you do you have committed a felony if you haven't went through the whole process of registering it with the ATF and getting the LEO permission. BoxHard further down from Rotinoms post you ask if this would actually work on a real firearm, the short answer is yes, i am not going to go into the long answer but lest just say it involves some modifications to the materials.

What if you live in Canada?

mathieulj (author)comander012011-05-23

I had quickly looked into this and it looks like were out of luck too. Apparently the mere fact that someone could adapt it to a gun make it illegal here. If anyone has a video of a 50 cal (near the right diameter) firing through this, please post it so i can see the silencer explode...

I know it's been a crazy long time since you posted this comment, but on the show Sons of Guns, on the Discovery Channel, they DID silence a .50 cal sniper rifle.

Look it up.

I watched that episode a little while ago.

Notice the major differences between the two. Red Jacket used machined aluminium (most likely aircraft grade like the 7075 alloy) that, if done right, could hold up to very high pressures (like thousands of psi depending on wall thickness) were as this one is made out of PVC witch is only rated at around 90psi. PVC is also relatively brittle so an impact such as the gun firing would likely destroy it before it even muffles a single shot. As an added bonus, when pressurized with a gas, PVC has a nasty habit of exploding into shards like glass.

There are no laws against the ue of silencers in New Zealand..

rogerdemin (author)rotinom2011-07-05

Once again someone who has no understanding of the laws in the USA giving BAD/ WRONG advice. First as I have already stated there is no 250.00 dollar tax stamp! There are two denominations a 5 dollar and a 200 dollar. Suppressors require a 200 dollar stamp I have a pile of them. You do not need permission form your local pd they juts have to sign off your not a bad guy of course folks like me who have a NFA ( national Firearms Act ) trust do not need to get the local le to sign anything nor do we need fingerprint cards.

Almost EVERY state allows suppressors and Machine guns.

It is not a class three stamp!! It is a tax stamp. The person who sells NFA items much have a FFL ( Federal Firearms license) and to sell NFA items they also require a SOT ( Special Occupational Tax ) these like the FFL come with different numbers that determine what they can do IE sell make or import or combination of.

In short a suppressor without a tax stamp is ILLEGAL if it can be adapted to a firearm. IE the models of airguns with suppressors made onto them are not illegal and require no stamp.

IF you are at all unsure or are not dealing with a FFL SOT then go to ATF.GOV and submit your question to them. The majority of answers here are blatantly wrong. The fact is not doing it right can get get you a felony on your record Jail time and a major fine to boot. Make sure your doing it legal BEFORE you even think about building one. EVEN A PART of a suppressor is illegal to posses without a tax stamp in hand.

OruKun (author)rogerdemin2011-10-07

I say i have a right to make stuff and do with it as a will as long as it does not hinder anyone else right to life, liberty , and pursuit of happiness. The pursuit of happiness from winning a round of paintball with me can and will be denied =}.

You just have to play the constitutional rights card and I didn't hurt nobody but myself when i was poking holes for my paint suppressor so don't tread on me Uncle Sam! And Come and take it ! (no don't actually...)

The3rdPunch (author)rotinom2011-04-23

officially, they are called paintball "markers" not guns. They are used in a recreational sport which is about as illegal as baseball or football. Making a silencer is like drinking a gatorade meaning, it gives you the upper hand for about...12 seconds...

i'd say that they give no upper hand at all

You know that was a joke xD

if i didnt think it was a joke i'd have been more butthurt

cantrell8 (author)rotinom2011-07-01

actually they are not illegal because you can buy barrels that silence

BOXHARD (author)rotinom2008-07-08

Another thing to try would be stolen from auto muffler designs... fiberglass.... I really like the build though, nice idea. I may build one to play around with... I would think this would be considered more of a novelty though wouldn't it? I mean do ya really think ya need to register a pvc paint ball silencer? I don't know, just makes me wonder though...

rotinom (author)BOXHARD2008-07-08

Unfortunately no. Search the internet for "paintball silencer" and you'll find forums who forbid talking about it, and lots of discussion on the fact. Sad, but true. I believe the tippman (a paintball marker manufacturer) has banned mention of them in their forums, just for that reason.

Found this, which is further discussion on PB silencers:

Kids, don't go to jail :-)

Dan Bailiff (author)rotinom2008-07-09

This looks cut and dry to me. As silly as it might sound to some, making a silencer that works on a paintball gun will also make it work on a real gun; therefore, it's illegal and you shouldn't do it. Once again, I think we have another instructable where the staff of this fine web site should use some good judgment and remove this one. It's one thing to have "free information" and another to condone information on how to commit a crime.

technodude92 (author)Dan Bailiff2008-07-11

i would also have to disagree, this silencer would fail quickly if used on a firearm. the reason being the flash would not only melt the PVC but also ignite the cotton balls. Therefore, it will not work on a firearm.

ToolboxGuy (author)technodude922011-06-05

LOL! If you read instructables, I can only *assume* you'd have the skills to produce this with metals instead of PVC. Besides, it'd be easy to make several "disposables" too. It also depends on the number of rounds you plan to fire- preferably just one with this model.

m1keo (author)technodude922010-05-25

I dont think cotten balls will light. I will go try right now.

Viator77 (author)technodude922009-09-18

No, it most certainly would not, as per my above post. But I'd rather my paintball marker be loud than have to shell out for bail, a lawyer, court costs, my name in the newspaper as an "alleged manufacturer of illegal firearm modifications," etc.

BOXHARD (author)technodude922008-07-11

I think it's lame that you need to register a silencer for a paint ball gun... BUT as far as the arguments sake of this thread... would actually work on a modern firearm... at least as well as if not a little better than a 2 litter coke bottle... And by that I mean it would work as a disposable silencer... but why go through the trouble... I mean, sure, people build "real" silencers everyday for one hit jobs, but if all you can come up with is pvc... then your some low budget cracker who's gonna get tagged anyway by those finger prints ya left in the damn pvc glue... lol

rotinom (author)Dan Bailiff2008-07-09

I would have to disagree. Even though it is illegal in some jurisdictions under certain circumstances (i.e.: The US without the proper tax stamp), this is perfectly legal in others. The Internet is a global community. Just because we can't have fun, doesn't mean that others shouldn't either :)

m1keo (author)rotinom2010-05-25

comander01 (author)Dan Bailiff2008-07-19

You should really check out the instructable on the anti-theft electric bike. Someone could easily up the amperage using a series of capacitors, making it potentially lethal.

About This Instructable




Bio: Creative 125 year old who spends his extra time making things. Sucks how I don't document everything I build.
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