Mini Spud Gun:

ok today i am going to show you how to make a mini spud ( by mini i dont mean by one of those spud guns made from chap sticks i mean a spud gun with a half inch barrel.

ok since this spud gun is really held together by tape, it can explode so wear safety gloves, earplugs, and safety glasses.
i dont take any responsibility if you do get harmed by this gun, i also do not take responsibility if u harm other people or things.

sorry for the bad picture quality.

and for those who think i copyed it off youtube. i didnt because i made this before i saw the vid on youtube.

plz leave a comment.

Step 1: What You Will Need:

1x plastic peanut butter container.(or in my case a stock container but i highly recommend a peanut butter jar).
1x gatorade bottle top
1x pvc pipe barrel any sixe you want just as long as it isnt bigger then the gatorade bottle top.
2x thumbtacks
1x lighter ignitor
Boxing tape and electrical tape
and scissors
you might also need a knife.

Step 2: Step 1: Preparing the Chamber

ok for this step you need to put a hole on the bottom of your container. NOT ON THE LID. you can either start this by jamming your scissors in it and cutting arounbd the edge or do the same thing with a knife.

warning: do not cut yourself lol like i just did.

Step 3: Step 2: Installing Ignitor

ok if you have made mini spud gund before you will know this step if not read on.

before you go onto the next instructions reinforce your chamber with electrical tape for safety.

ok we will need our thumbtacks for this. what you will have to do is make your thumb tacks look like this in side of your chamber \ / . once you have them looking like that connect the ignitor to the thumb tacks then check for the spark. if there is no spark you either have a shit ignitor that is broken or you are shorting out somewhere.

Step 4: Step 3: Preparing Barrel

ok you know your bareel isnt big enough to fit snug in the gatorade top so wrap your boxing tape around your barrel until it fits. then when it is big enough add two layers of electrical tape on to make it go on better. once that is done put your barrel on the gatorade top and secure it good with your electrical tape.

Step 5: Step 4: Connecting the Barrel to Chamber

Now for this step all you have to do is tape the completed barrel onto the chamber. be sure it is secure and reinforce everything with tape.

Step 6: Finished!!

ok when using wear safety gloves, ear plugs, and safety glasses.

ok DO NOT start your first shot with a potatoe start it with a tissue and only shoot tissues until you are confident to use a potatoe.

ok put your tissue in the barrel then plunge it down to the end of the barrel

then open the end cap and spray your chamber for 1 second let some oxygen in then close.

then hold on tight and ignite!.

now play safe and dont forget your safety gear!! and dont shoot your neighbours cat or shoot your brother/sister and if u do...... i take no responsibility.

oh and try to reinforce your end cap.



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    27 Discussions


    3 years ago

    ummmmm this isnt really small and could cause some serious damage


    7 years ago on Introduction

    if you use a pen tube as the barrel you can shoot nerf darts with some pretty high force!

    ...i thought it was pretty cool.

    1 reply

    Reply 6 years ago on Introduction

    you want to be careful though. the force is made by flame and it could melt the bullets. so just be careful :)

    the only thing stopping me from making this is the igniter :( is there any substitute for that? maybe if I just take a battery, stick it to a capacitor, stick that to a switch then... never mind

    you inspired me to make another instructable :D

    4 replies

    there are some really cheap lighters at the dollar store with ignitors in them, the only hard part is finding them, but lots of dollar stores are carrying jet lighters now, and jet lighters have what youre looking for.

    heres an idea, use a solenoid to touch the two ends of the capasitor together, rather than poke stick through the barrel to make a spark.
    solenoidsare basicaly like motors, but instead of going spining when electricity passes through them, they push or pull the shaft, now correct me if im wrong, but doesnt a camera cap spark generatre quite a bit of heat? a bbq peizo does not do this to the air, but if the spark travels through a fuel, it will heat the fuel, a cap spark is much hotter and powerful, it will definitely ignite the fuel in your gun, even if theres too much or too little, but youll know that when the shot is tiny.
    hope i helped

    perhaps a mechanism could be used to boil the achohol away, as hot vapour wont melt the plastic, something like a glow mplug, wont ignite it, this could fill a hand pump, to deliver, precise amounts of fuel, as i would guess, its hard to get the spray to air mix correct for this to work, as the smaller spud guns like this, cant combust as easy as the larger ones

    The only thing stopping me is the fuel! I have different plans for the igniter, but I still have no fuel :(  

    Could I use alcohol for the fuel? Maybe I should just go for the pneumatic spud gun, but I still have no pump :( So many problems... 

    8 replies


    alcohol will dissolve the pvc , so will hairspray, go safe , use butane, or propane if you can. but a mixture of the two, such as found in hair spray is best.

    if using hair spray please use an anti liquid pray filter, it only allows the gas out, but traps most of the dangerous liquids that melt your potato gun

    do I look like I want a muzzle-loading gun? I'm going breach-loading with that piece of PET (the bottle). I just vaporize the alcohol in the bottle then it won't dissolve anything now will it?

    yes, good point that is true, it wont dissollve it immedately, but will none the less, ide advise to anyone who plans on using gasolene or alchohol as their fuel, if their using it in a pvc potato launcher, please, before you do this, coat the inside of your spudgun with wax. even evapourated alchohol and gasolene still will weaken the pvc, eventually you will get a bubble effect, internally, and then the spudgun will explode.

    this happend with a friend, he wasnt hurt, but he realised what could have happend if he was.
    anywho, to prevent this just coat the inside with wax, or if your superserious on PERMANANTLY using your potato lucher, using alchohol or gasolene as a fuel, vapourise plastic and have it coat the inside.

    to do thsis is quite simple, for wax, just put a hell of a lot of cotton in a wax candle that has melted, light it up so you get a very big flame, then place some kind of weak oxidizer on it, like powderd potasium nitrate (just to keep it smoking after its blown out), then blow it out and instantly place it inside your sealed barrel, at this time the candle (which must be in a metal holder of some sorts), should be rather hot, it will produce alot of smaoke, which is wax vapur, it will collect of the sides of you spud gun, hooray , longer lasting spud gun.

    now i know wax dissolves in gasolene, but when like thart cannot combust, under the exploding conditions inside the spud gun.
    basically youll know when your spud gun would normally be melting inside when the wax becomes runny or gooey. yes, this will make it last for a long time, and is recomended for those complex multi-part potato launchers that are made in countries without the riddiculously large reducers avalible in america, so basiclly, complex ones, this is what its for, also sugar works ok too, but its hard to tell if its water or fual making it gooey, when in humid conditions.

    hahaha yeah, i was just my brother had one and it was hairspray powered and it was awesome...haha i should make one soon.

    hey!! sorry for a late reply but i probably think you have figured out what to use but anyway ill still answer your question =]. well i had the same situation as you =[ ran out of lynx....... so i used metho........(alchol) and the damn thing blew up in my hands rofl but no harm done i was wearing my gloves =] and about that ignitor i think that would work lol and i really love that i have inspired you to make an instructable =]. peace. =]

    thanks, but I sort of forgot about where I put those blueprints :( real world responsibilities got the better of me. but I do still remember the capacitor thing :D


    8 years ago on Introduction

    Why not just small pieces of scrap PVC and some reducers? the glue and primer isn't THAT expensive...


    9 years ago on Step 1

    thats freaky i already used a stock container before i watched this vid........ but i put on a narrower longer barrel and it shot a sinker through my