Introduction: Knex Auto-loading Marble Gun

Picture of Knex Auto-loading Marble Gun

This is a auto-loading gun that is very simple.
It dose not use a trigger but you pull the pin back and let go to fire.

Step 1: Barrel

Picture of Barrel

Build this (I couldn't find my whites so I used 3 yellows instead of whites)

Step 2: Auto Loader

Picture of Auto Loader

build this. This is a bit tricky
Then put a white rod so that figure 5 is symmetrical.

Step 3: What You Have.

Picture of What You Have.

Build the firing pin. you should have these parts.

Step 4: The Gun

Picture of The Gun

put the clip on like this

Step 5: The End

Picture of The End

Put the elastic on like this

To shoot put marbles in the top like this then pull pin back.


Bartboy (author)2008-08-14

Anyone interested in my trigger mod?

DrWeird117 (author)Bartboy2008-08-19


Bartboy (author)DrWeird1172008-09-23


Wafflicious (author)Bartboy2008-12-01

i put the clip back farther and it shoots 3x farther

Bartboy (author)Wafflicious2008-12-01

Cool! I think marble guns are good because they hurt, but they won't cut you.

mashedpotato13 (author)Bartboy2009-02-12

I reccomend wooden marbles.Thx!

really? i use marbles made out of cast gunpowder. probably shouldn't fire those things at humans, but they make very good entertainment if you go onto the roof and shoot at the ground near people! scares the crap out of them!

DrWeird117 (author)mettaurlover2009-02-25

You have lost Karma. >: (

mettaurlover (author)DrWeird1172009-02-26

so? I already have most of the forces of the universe against me, why stop at only most? the worst that could happen is that i get spontaneously vaporized in the most painful way possible. what's to worry about?

DrWeird117 (author)mettaurlover2009-02-26

Uh, Fallout 3 joke.

Blackonyx2234 (author)DrWeird1172010-12-10

I Love fall out 3

Please don't necro comments. It annoys everyone in the comment chain by sending email about something that they've left alone for a long time. There's also no reason to do so to say four words and a number.

Bartboy (author)mettaurlover2011-02-11

Charming as you are, pi.

mettaurlover (author)Bartboy2011-02-11


Bartboy (author)mettaurlover2011-02-11

Anything's better with pi. Even tau.

mettaurlover (author)DrWeird1172009-02-27

i'm not joking. i really do have most of the forces of the universe against me.

knex_mepalm (author)mettaurlover2009-05-19

The force of friction against you? wow? including gravity? How do you shpoot people with that than?

An Villain (author)mettaurlover2009-07-02

i saw people playing with a fireball type thing. it is a firework that flies around erratically in the air. it went into someones mouth.

Seleziona (author)An Villain2009-12-09

LMFAO! sorry, but did it actually?


what? the lack of sanity is GREAT!

Wafflicious (author)Bartboy2008-12-08

ye they are pretty cool =)

Bartboy (author)Wafflicious2008-12-08

With your skills, I suggest you try to make one, im sure it would be something!

Wafflicious (author)Bartboy2008-12-08

well thank you ... but it prob wouldnt have a trigger.... me dont likey triggers

Miles Tails Prower (author)2009-04-15

DONE DONE DONE. True trigger, mag can be larger or smaller and cool looking:

That shoots marbles????

An Villain (author)Bartboy2009-07-02


Miles Tails Prower (author)2009-04-15

I will make a very good marble gun with true trigger. Will post pictures soon.

Bartboy (author)2008-11-12

Any recent comments?

coolcal (author)2008-08-28

has anyone got types to make it powerfuller

Bartboy (author)coolcal2008-09-23

well, my modded one has a block trigger, so you can just add more elastics, but othe than that... oh, and marbles are more close range, cause this has bad range, but it hurts a lot more than a normal gun of equal size

coolcal (author)2008-08-28


bannana inventor (author)2008-06-13

don't shoot your eye out kid!!! lol

Bartboy (author)bannana inventor2008-06-13

it won't shoot an eye OUT, but it could hurt LOL

pikathebudgie1234 (author)2008-06-09 did you get the picture of that robot to look like link???

photoshop will work

halo-knex-gr8 (author)Bartboy2008-06-26

I LOVE PHOTOSHOP, you can make the exorcist when she turns green from a 9 year old girl, lol :P

wussap (author)2008-05-17

nice a marble launcher, though a bit too simple

Bartboy (author)wussap2008-05-17
it works!

  • , \
  • ' /

dsman195276 (author)2008-05-17

WRONG! This gun is not semi-auto just because it does not have a trigger. your logic there is saying that i could hold down the trigger on any auto load pistol and call it semi-auto, and we know that is not the case. for that reason this is a auto-load pistol, not a semi-auto pistol. a semi-auto has to have a trigger, as the semi-auto mec has to bull back and release the firing pin. the trigger controls this by letting you pull back and release the firing pin when you want. also, its not a clip, its a magazine because you can not load it without it being attached to the gun.

Bartboy (author)dsman1952762008-05-17

ok i will change it to auto loading, but it is a clip, you can load it when its not attached.

dsman195276 (author)Bartboy2008-05-17

when you have the mag unattached can you load it with out having all the marbles fall out?

Bartboy (author)dsman1952762008-05-17

yes but it is difficult to put the mag in with marbles in because they can jump out I have made my own version better, it has a trigger , not a true trigger but not a block one

s0lekill3r (author)dsman1952762008-05-17

Well said, I hate it when people confuse auto-loading for semi-auto.

dsman195276 (author)s0lekill3r2008-05-17

thanks. ya, i do to. it gets all my hopes us and then just crushes them.

dsman195276 (author)2008-05-16

not semi-auto...

About This Instructable




Bio: I'm an inactive K'nexer, I used to be one of the most active ones, but I have a lot of other things to ... More »
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