How to Make a Paintball Silencer

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Introduction: How to Make a Paintball Silencer

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

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#############################DISCLAIMER########################################
####I am not responsible for any injuries deaths or felonies you cause with this device.#######
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Well, I basically took this idea and ran with it.
https://www.instructables.com/id/Make-a-silencer-for-MOST-paintball-gunsmarkers/
I updated it and fixed where he left off. It works well and its fairly light depending on what kind of PVC you use.

Step 1: 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)

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)

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)

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.*

Step 5: 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

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

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

Step 8: 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.

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    228 Comments

    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.

    are silences allowed in Australia?

    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

    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!

    i found 8 airsoft BB's XD

    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.

    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

    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.

    silencer ible.jpg
    3 replies


    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.
    http://www.atf.gov/firearms/faq/national-firearms-act-firearms.html#paintball-airgun-suppressers

    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.

    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.


    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.
    http://www.atf.gov/firearms/faq/national-firearms-act-firearms.html#paintball-airgun-suppressers

    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.

    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.

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

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

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

    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.

    3 replies

     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.

    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

    CO2 is what is used in FIRE EXTINGUISHERS.