Introduction: Full Auto Knex Oodammo Slingshot 2

Picture of Full Auto Knex Oodammo Slingshot 2

This uses a really advanced trigger mech. It fires 3 rounds of oodammo from the back of the stock. The trigger must be reset by hand after firing. Build from the pictures. I don't have the entire gun made with real knex, but I did build the trigger to ensure that it works. It has a 3 round magazine and fires the bullets consecutively as the trigger is pulled down (you can fire full or semi auto this way). Attach 3 elastics (one for each round in your guns max capacity) to each of the blocks (6 elastics in all) at the front tip of the barrel.

If you build this, please take picture(s) and/or make a video. Ask me first if you would like to make an instructable for it.


The second picture shows the new front end and new elastic placement.


tinyhooman (author)2016-09-23

Is it rlly full auto?

wabawaba (author)2011-06-05

I made this a while back and it shot wheels instead of oodammo

apples!!!!! (author)2011-05-04

Dude, I love the ideas you come up with. They really get me to think more and more; this is an awesome concept(though I'm way late in seeing this lol).

Ukiarue (author)2010-06-28

what program is this?

RMConstruction (author)Ukiarue2010-11-28

MLCad with K'nex mods.

Ukiarue (author)RMConstruction2010-12-03


Chikara (author)2010-06-08

i built the mech and put it on an already build rifle.. it doesnt work too well, though, sadly. it's more of a shotgun, it shoots them all at the same time, because once one oodammo comes off, the others slide to the top and fly off. it works great as a shotgun, though xD

Oblivitus (author)Chikara2010-06-08

You attached the elastics at the front of the gun to a point that is too high, put them on lower and it should be semi-auto.

Chikara (author)Oblivitus2010-06-08

i tried that, but the rod that you put ammo on bends forward too much. the ammo then slides up the slope it creates.. :S

Oblivitus (author)Chikara2010-06-10

Darn, I was afraid that would happen.

Chikara (author)Oblivitus2010-06-10

yea, it's still a really great concept, though

Chikara (author)Oblivitus2010-06-08

edit- if you put small bands on, then it works. just doesnt get enough range :(

heatblast (author)2010-05-06

DAMN, this just  keeps gettin better and better. 4 stars :p.

Oblivitus (author)heatblast2010-05-07

Thanks, but how about a 4.5? You rated 4 on the first one.

DJ Radio (author)Oblivitus2010-05-07

He can rate it whatever the f**k he wants, don't tell people what to rate your stuff.  I swear, if people put as much time as they did getting people to give their stuff good ratings and getting people to subscribe them in making their content, then the content would actually be better, and the ratings and subscriptions would come naturally from the good quality work.

zyoxin (author)DJ Radio2010-06-03

heres a thought and this is a little late in the commenting ideals but it takes 3 seconds to ask for 4,5 whatever stars and like 5 seconds to type it. so unless the person asking it is a super genius and can make their videos that much better in that amount of time then your comment my friend was infact a waste of.... finger strength? time? whatever point being just stfu and deal with it DJ.

Oblivitus (author)zyoxin2010-06-03

Thanks, but I often don't bother arguing with people who blow up at me. I don't deserve their disrespect and they should learn to control their feelings to make a respectful remark. The way that the comments themselves are written shows everyone who is more reasonable and therefore more believable. Agressive comments, demeaning and swearing all make the commenter, not the person who is being bashed, look bad. Once again, I appreciate the defense, but don't stoop to their level, it looks bad. Thank you.

DJ Radio (author)zyoxin2010-06-03

Sure it might take a minute to ask, but people who ask once more often than not ask many times, and the time spent adds up.  This applies to pretty much anything.

Also, some people go as far as to type up lengthy PM's to send to individual users, so that takes at least 3 minutes to do.  I've been on the receiving end of a few dozen of those, and it gets really annoying.

Oblivitus (author)DJ Radio2010-05-07

Yeah yeah yeah, I just thought I'd try.

heatblast (author)Oblivitus2010-05-10

Okay......  I guess? Awkward moment.

prodo123 (author)2010-06-01

so is this a burst-auto, a full auto, or a semi?

Oblivitus (author)prodo1232010-06-02

It's supposed to be semi, but since I've never actually built it, I don't know for sure. The further the trigger is pulled back, the more rounds fire.

prodo123 (author)Oblivitus2010-06-02

That's a variable-trigger semi.


Eddiepers (author)2010-04-23

yay, a bulpup version, can i have this ldr too??


Oblivitus (author)Eddiepers2010-04-23

I'm sending it now. How did the last version work out for you?

Eddiepers (author)Oblivitus2010-04-26

it's pretty good, an ocasional problem i have is that after the first shot, the bands get in the way of the other 2 shots, making them suck.

Oblivitus (author)Eddiepers2010-04-26

Thanks for the info. I just posted a mod to this one that should eliminate the problem. I might do the same for version 1 as well.

Tom Buckey (author)2010-04-22

May make it :)
again I will post both number one and two. If thats okay :)

Oblivitus (author)Tom Buckey2010-04-25

You can post both 1 and 2. Okay?

Storm950 (author)2010-04-25

This looks good Obliv. I may end up making a single shot slinger with your mech. I'll post pics if I do.

Jesus. (author)2010-04-24

Nice! I built V1 and got it to shoot 125FT!

Oblivitus (author)Jesus.2010-04-24

Dang. How many bullets at once? Please make a video.

Seleziona (author)2010-04-23

sweet trigger! 5*
I made your other one and it was okay. Is this one better?

agent harmsy (author)2010-04-22

So can the mag cap be increased? if it can, I'll give it a go :P

Oblivitus (author)agent harmsy2010-04-23

No, but if you make a stronger barrel on my first version, you could probably get it to fire 5 rounds.

MegaMetal8 (author)2010-04-22

pretty awesome 5*

TheChemiker (author)2010-04-22

How is this the most advanced trigger?

Oblivitus (author)TheChemiker2010-04-22

I'm withdrawing that statement.

TheChemiker (author)Oblivitus2010-04-22

Good.  That is a mostly a matter of opinion, unless is is really epiclly huge and complicated and new.

Oblivitus (author)TheChemiker2010-04-22


knexsuperbuilderfreak (author)2010-04-22

O.o 3.33 rating and 3 ratings nice gun tho

~KGB~ (author)2010-04-22

that is epic! 5* nice trigger!

jamesdude (author)2010-04-22


barrax (author)2010-04-22

looks awesome

nice bulpup trigger as well :)

About This Instructable




Bio: I paint, write music, and used to build knex guns. I have a Bachelor's Degree in Studio Art. - updated 5/7/2014
More by Oblivitus:Z3 Knex Gun (3-Barreled Semi-Auto Pump Action Revolver)Z3 Knex GunZ3 Knex Gun Firing Demonstration
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