Introduction: Paper Wasp Pistol

Picture of Paper Wasp Pistol

It is a simple gun which shoots paper projectiles. It can penetrate an A4 paper from 1 meter.
I didn't post instructions because it is fairly simple and you can make your own easily in your own way. It was first a rifle-like weapon and was a simplier design, but than i changed it to a pistol. You can built a rifle version in the beginning for simplicity, in which the trigger(knex rod) is in backside of the gun.
It is fully made of Lego except a few k'nex parts. It could also be built fully with knex but i prefered lego. I have posted some images with different angles to make the mechanism clear.
Warning: Don't use anything other than paper as bullet since the gun's upper side is open, there is a little risk that it can backfire. Also it can be harmful for eyes in close range, don't shoot at people.

Step 1: Paper Bullet

Picture of Paper Bullet

just paper

Step 2: Mechanism

Picture of Mechanism

there is a balance between the two sides. When you pull the trigger, the rope gives up and releases the knex rod. And the rubber gets free

Step 3: Mechanism

Picture of Mechanism

you can see the details of mechanism

Step 4: And Finally Aiming

Picture of And Finally Aiming

the gun is not symmetric, but in the end it doesn't matter

Step 5:

Picture of

Ok here is the parts in more detail but i won't release any full instructions. There is no need to release instructions for connecting simple duplo bricks. You can build your own if you get the mechanism.


3-Where the cock sits
4-Rubber band holder in the very front

There is not any other complex part in this gun. The other parts are just for holding the gun together.

note: you can build a rifle-like version, by using the lover side of the cock as the trigger. It is much simpler and you can convert it to a pistol is you want. Only the rifle-like version requires two hands to use.


Colne Fawkes (author)2010-12-03

you said we can build it if we can get the mechanism, but what if we cant get that? Will you post an instructable for that?

gazillion114 (author)2010-09-02

plz make a step by step able for this, it's really cool, but i can't build it ; )

nutsandbolts_64 (author)2010-06-12

I'm gonna make a popsicle stick version of this. It's gonna take me 1 hour plus or minus 30 mins to build it. I'm gonna post pictures of it in 15 hours. I'm gonna publish an instructable in 38 hours. I'm gonna publish test results 2 hours after instructable publication. So 40 hours after this comment post, I would have a fully functioning wasp gun, a detailed instructable about it, and a field report stating its effectiveness in
classroom combat.

The test parameters are as follows:
- size
- range
- stealth
- power
    - shoot A4 paper (more and more layers until wasp-proof)
    - shoot cardboard (shot with metal-point wasps (aka. MPW's))
- ease of construction
- ruggedness
    - shelf life (how long it would last not used)
    - continual use duration (how much it could fire before failing)
    - stress load (how much external force you can apply on it before                failing)
- idiot-proof construction (how noob someone should be before he/she couldn't make one)
- idiot-proof usage (how noob someone should be before he/she couldn't use it at all)

This is getting too long. PM for more information...

dwhdwhdwh (author)2009-10-21

can you plaese make a step by step insructable on how to build this pleeeeeeeeeeeeeeeeeeeeeeeeeeeease

xbowman (author)2007-12-07
here is the video. But the gun in the vid is a lil bit modified.

wangtrevor (author)xbowman2009-03-03

you makea pretty decent crossbow but try bitterberrys a2 crossbow with you rubberband style. Hecka pwnage

dsman195276 (author)xbowman2007-12-21

dont smoke :)

xbowman (author)dsman1952762007-12-24

haha, good detail you catch. but don't forget people penetrated beer cans with knex rifles in this website :) I cant give up smoking plus i can't miss the chance to die from heart attack or lung cancer at worst case. Life sucks :)

dsman195276 (author)xbowman2007-12-24


xbowman (author)dsman1952762007-12-24

hehe no, i was drunk at that time :)

dsman195276 (author)xbowman2008-01-04

so you drink to?

xbowman (author)dsman1952762008-01-05

i drink rarely. btw, i really want someone to make this weapon's k'nex version. It would be more popular. I suck at knex creations and also i don't have enough pieces of knex.

maxmaz2 (author)xbowman2008-02-18

i made 1 ot of knex... it SUCKS!!

xbowman (author)maxmaz22008-02-21

Dutchj made the knex version of it and it doesn't suck according to what he says. Too bad he didn't post an instructable for that.

maxmaz2 (author)xbowman2008-02-22

well i made one and put it on instructables as knex rifle

dodo91 (author)2009-01-06

this is cool! were I live, there called hornets, not wasps. but anyway, there popular at my school. what would be really cool for you to make is a satellite launcher. a satellite, if you never heard of them, are erasers with staples/paper clips stuck in sticking out. we would throw them at the ceiling and they would get stuck.

wangtrevor (author)dodo912009-03-03

that would hurt like heck...

wangtrevor (author)2009-02-25

I agree and id rater use my hands yo put a rubber band on you htumb them stretch it onto you index mold some little pieces of paper into 3 cm by 1cm and a thickness of .3 cm fold in half and then load onto the rubberband on your fingers than pull back then let go. BTW this is more of a slingshotty crossbow

6uo4b (author)2009-01-24
I think mines are better.
No offends.

My link on mocpages: paper wasp gunDouble barrel version

And an instruction:
xbowman (author)2008-09-29

I have added new pics. Please check step-5

ShotPain (author)2007-12-25

Roflmao K'nego

Oompa-Loompa (author)ShotPain2008-09-02


YummyPancakes (author)ShotPain2008-05-16


Maxaxle (author)2008-07-18

That looks cool, but the mechanism isn't clear...

sampson643 (author)2008-05-26

ya, how do you make it?

coolz (author)2008-05-17

you dont even tell us how to make the thing

jacksteal4 (author)2008-02-14

kewl gun crappy instructions

PineapplebobTheGreat (author)2007-12-15

I typed in knex and this lego thing came up... LOL... How did that happen?

there is a piece of kn ex sticking out of the top

Dutchj (author)2007-12-10

Here's some pics of my K'nex version of this.

dsman195276 (author)Dutchj2007-12-15

nice. I have tried to make other lego guns out of knex... miserable failure. the demsions and way the peaces connect made it very hard. and i did not have the gun. also in the gun i tryed to make the lenth of the barrels was everything.

SeMi_AuToMaTic (author)Dutchj2007-12-12


I like that.

Mr Tenacious (author)2007-12-13

Do you make a lot of Lego guns? This one is quite a new idea, great work.

xbowman (author)Mr Tenacious2007-12-13

thnk u. Well, i actually don't make lots of lego guns. There are already excellent ones in this website, either knex or lego. But shooting something other than lego piece or knex rod is a new idea yes :) you don't need to worry if the bullets are lost, it is just paper

bruce911 (author)2007-12-10

I really want to make this but I do not fulley understaand the mechanism. Could you help me a bit...

xbowman (author)bruce9112007-12-10

bruce, you may first build a rifle-like version which you have to use both hands to fire and than mod it to a pistol if you want. That is simplier to start with. I am posting an image to make it clear for you. The mechanism is very easy, when you pull the trigger the rope releases from knex holding it. So the wasp flies away

bruce911 (author)xbowman2007-12-11

Ok, cool. Thank you I understand it now.

xbowman (author)bruce9112007-12-10

this gun is much more easier than your XM8/FN SCAR Knex Gun :) Btw, dutchj said he will post the instructions for the knex version of this weapon. So no worries

Dutchj (author)2007-12-09

It's not really flimsy anymore. You can twist it a bit, but it won't unless you actually try to. I also made it a bit longer now since my first post. I'll post some pics here tommorow. I might make a new one that has a stronger design and post it in Christmas Break...

xbowman (author)Dutchj2007-12-10

well, so i would like you to post your own instructable(not just pics) when you feel it is ready to publish. Because knex gunz are more popular than lego ones, it would be more useful than mine for the viewers, to be honest.

Dutchj (author)xbowman2007-12-10

I will when it's ready. I'll post a link to this gun too, cause it isn't really my idea ;)

xbowman (author)Dutchj2007-12-10

that would honor me. thanks btw :) but as you see mechanism is very simple, only original idea was making something shooting paper projectiles

Dutchj (author)2007-12-09

I liked this idea ( Mainly because we used to have wars with those wasps in school =D ), so I built an all K'nex version of this using the same mechanism. It works like a charm, only it's a bit flimsy because I wanted to make it quickly. I could post some pictures if anyone is interested.

xbowman (author)Dutchj2007-12-10

looks nice :)

Dutchj (author)xbowman2007-12-10

Thanks, I made some slight adjustments to it now so it looks a little less messy. There's only some blue rods sticking out of it now xD Most of them have the rubberband on them anyway.

Daniel662000 (author)Dutchj2007-12-09

I'm interested!!

Nice idea, I got shot with one of those paper bullets in my hand and it bruised it pretty badly.

I shot my version of this at my hand. It hurt badly too xD. I should've known better as I always had wars with these in school...

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