Introduction: Fold Up Knex Rubber Band Gun Prototype

Picture of Fold Up Knex Rubber Band Gun Prototype

Hello everybody this is my latest project - my new fold up Knex RBG gun. It uses the mech from this gun by Yttrium but the rest is my own design. This gun can hold 8 rubber bands and it folds down to a nice compact size. This gun is small in the first place so it might not be as comfortable for people with longer arms but it works fine for me. If you have any ideas or ways to improve this please post your ideas in the comments below.


folds up into a nice compact space

fires one band per trigger pull

looks cool IMO


kind of weak

handle does not lock in very tight

must use pin to lock in barrel

trigger is kind of hard to pull at first

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The Knex Inventor (author)2016-06-21

Really nice gun and concept! I like it! Favorited! :-)

sonic broom (author)2015-06-20

Maybe if I make a new one. Here is a link to the gun that I used the mech from.

sonic broom (author)2015-04-09

I plain on making a second RBG gun that folds up do any of you got any ideas

dr. richtofen (author)2015-02-18

It's pretty cool that there's a (pseudo) semi-auto mech in gun this size. The collapsing handle is a nice touch as well.
Good job on it!

Yes it is nice to have everything fold up into a compact package. oh and what do you mean by (pseudo) semi-auto mech it's just a rubber band gun that is semi-auto.

If I'm correct, the semi-auto rubberband guns that work like this one, get called "pseudo semi-auto", because you still have to load every rubberband seperately, instead of loading all the 'ammo' at once.
I may be wrong though, so feel free to correct me on this.

So if i could just pop in a mag with bands on it then it would be full auto?

myOmy (author)sonic broom2015-02-20

no, it would be semi-auto, kinetic and i forget who else but some made a magzine for rubberbands. They made the first "powerpack" for guns. As it stands, their guns are the first and only non-psuedo semi-suto rubberband guns.

sonic broom (author)myOmy2015-02-20

What if you had a motor connected to the cog so that when you pull the trigger it switches the motor one and fires bands until you pull the trigger again witch turns of the motor and stops the bands from firing?

myOmy (author)dr. richtofen2015-02-20

I can second this, you nailed it on the head.

Lucas The Boss (author)2015-02-18

This looks pretty good, I think your next step is using paneling. See blue mullet and red book of westmarches guns, just look at the outer layer.


What do you mean by paneling just putting more parts on the outside so that it doesn't have so many holes in it or what?

It pretty much covers up the blue connectors and gives it a much cleaner look, and also makes it sturdier.

okay now i know what your talking about thanks!

sonic broom (author)2015-02-18

Yes it is a good trigger it was from yttrium's Rubber band gun.

sandroknexmaster (author)2015-02-18

Looks good!

CorgiCritter (author)2015-02-18


sonic broom (author)CorgiCritter2015-02-18


CorgiCritter (author)sonic broom2015-02-18

You are welcome.

CorgiCritter (author)2015-02-18

Hey, this is really cool! Good work!

sonic broom (author)CorgiCritter2015-02-18

Thanks! do you have any ideas on ways to improve it?

CorgiCritter (author)sonic broom2015-02-18

Just work on getting everything to look more clean.

sonic broom (author)CorgiCritter2015-02-18

what parts do you think are unclean the front part or what part of the gun?

CorgiCritter (author)sonic broom2015-02-18

The front could be made better. The stock and handle look pretty good, still, you did a better job then I could have.

About This Instructable




Bio: I like to make things and invent new products. i also like to cook read books and play with KNEX LEGO and other things. My ... More »
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