Introduction: Knex Gun OodaHopUp

Picture of Knex Gun OodaHopUp

As some of you may know, I was on vacation for a while and thus wasn't very active on the site. Well, I'm back. I built with k'nex on the trip. A lot. Hours. Mostly on a Oodammo pistol that was five layers and used a tan rod firing pin. that never worked out. So I tossed together a different pistol. I thought of posting it in the forum, but then I thought, oh what the whatever, I'll at least add a little more to a drowning community.

So here it is. On the outside, it looks bland, messy, and ugly. But there is more then that. This is a special gun.

This pistol has two very unique features. First, it has hop up. It shoots orange connectors with green rods snapped into both slots. The hop up is very pronounced, enough that this pistol could be used effectively outdoors. At close range if you aim at someone's chest the bullet might go over their head. There is a picture showing how the hop up works. With two bands, it will shoot magazine fed ammo over 60 feet!

Second, this is the first gun I have seen that is both built as a single shot and also as a mag fed gun, meaning it has a magazine AND a bullet lock. I'm not talking about a gun that has a magazine and you can dump a rod down the barrel and hope that it doesn't fall out. It can function great as a mag gun or single shot. It will shoot Oodammo 70 feet with two bands as long as the Oodammo does not tumble. And because it has Dr. Rictofen's bullet lock, you can load an Oodammo, and then load the mag, or you can use it just as a single shot when the magazine is empty.

This is a reliable and interesting secondary in a outdoor war.

And since some of you like Corgi pictures, I have a whole step devoted to that. There are also Internals.

Step 1: The Internals.

Picture of The Internals.

Ask if you have any problems.

Step 2: Pictures of My Dog.

Picture of Pictures of My Dog.

For dog lovers. :)


The Knex Inventor (author)2016-06-11

Great gun! What exactly is the hop-up's function?

It puts a backspin on the ammo so that it flies somewhat upward, like it was shot at an angle. It's mostly just a novelty.

Interesting. Thanks for explaining it!

master-splinter306 (author)2015-10-28


sandroknexmaster (author)2015-08-16


Vaetheon (author)2015-08-08

Looks great! The hop up thing is a neat feature too.

Also, is this forum more lively than this?

CorgiCritter (author)Vaetheon2015-08-09

Thanks bro!

Not really, I put stuff up there sometimes for the people how lurk there. That's where old K'nexer's like TD hang around.

Vaetheon (author)CorgiCritter2015-08-09

You're welcome. It's kinda sad that the community is dying though :/

Lucas The Boss (author)Vaetheon2015-08-09

Yea, the community's in its last days. I think we need a new website for just knex stuff. Any ideas?

TheDunkis (author)Lucas The Boss2015-08-10

I've considered building a website in my free time. I'd try offering the ability to import instructions from 'ibles so that we wouldn't "lose" instructions by moving over and could take the most important ones with us. But I didn't know if people would actually make the transition if I did it, so I've been a bit hesitant to start. Still, I need a personal project anyway so I figured it might be fun to do.

Lucas The Boss (author)TheDunkis2015-08-10

A new website would be great! Managing it would be a different story though. There would need to be a system of aproving the creation before it would be released to the web. If we didn't then there would be people posting irrelevant stuff and would corrupt the community (if you've ever been on G+ you know what I'm talking about). I'm sure you could get people to make the transition, I know I would. To transfer the instructions over you would probably need instructables permission and you would need to get permission from the creator of them otherwise it would be plagerizm.

Just make mods

TheDunkis (author)Lucas The Boss2015-08-10

Made a new forum topic, comment there if you "need" anything before making the transfer.

I was thinking about a screening process. New instructions would need to be reviewed by trusted members before they'd show up. Otherwise it wouldn't be too hard to have some community moderators for after-the-fact cleanups.

And actually, I don't need the permission of the authors, they've already given out permission technically. Most people (probably unknowingly) published their instructions under a license that allows us to freely take and -redistribute- (keyword here) without asking. I'll be checking these licenses before importing and give proper credit to the authors. I will probably end up checking with 'ibles web management for permission to "scrape" the website. I'll probably manually operate the tool per instructions and take import requests to start with. Then I'll work on automating it so that trusted users can import instructions on their own if they don't spam the system.

Vaetheon (author)TheDunkis2015-08-10

I'd definitely join

id be interested in helping out and moderating stuff although I'm not much help with building a website I would gladly help out when needed. The website is a great idea but no way to advertise it at all so it wouldn't be very crowded

knexcreator141 (author)2015-08-11

Great build!

Thank you!

CorgiCritter (author)2015-08-10


TheDunkis (author)2015-08-10

Pretty neat for getting back. The hop up feature is actually something I tried long ago with my TDS2. It was an optional part with a little flip-up part at the end of the barrel, similar to what you're doing. While it's a cool little idea, I just reasoned it's probably more efficient to simply aim the gun upwards yourself. Something you could try instead are adjustable sights to make aiming at an angle easier. Still, just for the sake of doing it, the hop-up is nice.

Got any plans for your next build? I'd say give a horizontal magazine gun a shot. That'd be interesting.

CorgiCritter (author)TheDunkis2015-08-10

Thanks. Yeah, hop up is a bit of a novelty. K'nex guns are so inaccurate that you don't really need adjustable sights. And for angle you would need to adjust them every time you move due to how much the ammo drops. The only gun that really benefited from good sights was my Wrecktangle Competitor, that could shoot decently straight.

Do I ever! I have it built! It is a Slam Fire gun, when the charging handle is pushed forward, there is a striker on it that activates an internal trigger, giving the gun a sick ROF. Why someone like BM or Lucas hasn't built one yet I have no idea.

I just need to clean it up and post! This will be my only claim to innovation, LOL.

The only other one I can find is the K2 and I don't have enough pieces, and this works very differently. I didn't even know the K2 was Slam Fire until I searched it as I wrote this comment.

I tried something similar a year ago. I had a pump action gun that when the pump was pushed back forward it fired. It Jamed a lot and was not reliable so I never posted it.

This never jams. :D

sonic broom (author)2015-08-08

I'm glade to see you posting again I find you projects very neat!

I was messing around a while ago and I built a pistol with a blue connector bullet lock it worked great!

i'm not a big fan of the trigger but it probably works great.

I might just build this if a get the time and mod it.

CorgiCritter (author)sonic broom2015-08-08

Thank you!

Yes, I do like this kind of bullet lock. I think Dr. R came up with it.

Well, I kinda like the trigger. The one on my other pistols was better then this. They are very smiler, but this trigger is a little difficult to band right. It might work better if I just banded the trigger like on Refuge and Viper.

CorgiCritter (author)2015-08-08

Thanks. Did yours have a blue connector bullet lock? I don't remember anything about it being muzzle loaded, but I believe you.

Well, to each his own. My Corgi isn't yappy. And I like mid sized dogs over cats since they seem more sturdy. I like dogs that run around and play rough and whine and growl. Not everyone does.

Knextremely stupid (author)2015-08-08

Hey dude you should make a turret rifle or something next I haven't seen you ever make one

Maybe, people on here don't seem to care for them much. I love them though.

myOmy (author)2015-08-08

I don't see the bullet lock?

And not to burst your bubble, but Oblivitus' Z35 is magazine loaded and has a bullet lock, granted the bullet lock is from the magazine pusher but as far as I can tell, that's what yours is. Please do correct me if I'm wrong.

And this gun is really good, I like the functionality of a hop-up and that it can have a oodammo loaded into the muzzle.

CorgiCritter (author)myOmy2015-08-08

Oh, and thanks! And the Z35 can't single load oodammo. Any gun can use the magpusher bullet lock, but that's kinda lame.

CorgiCritter (author)myOmy2015-08-08

See the blue connectors? They have the slots that allow them to snap together. The oodammo snaps into the slots, like in picture three. The lock is very strong and the oodammo never can fall out.

KnEx FrEaK 1 (author)2015-08-08

this is a very nice gun. no cons that I can find. and I love dogs and yours is so cute.

Thanks. :D

Lucas The Boss (author)2015-08-07

This is pretty neat! You should make a v2 with removable mags and use exchange able mags. Ex have the orange connector green rod ammo. Then have a oodammo mag that both fit the gun like me and blue mullet did on the WoW

Thanks! Perhaps I will.

This does shoot orange connectors green rod ammo...

Well, I like the idea of removable magazines. The point of this is that it is both a single shot or a mag fed, not an oodammo pistol. And I dread working with Oodammo magazines. I spend HOURS on a oodammo pistol of my own design trying to keep the mags from blowing up.

If I revisit this concept, it would be in carbine form to allow for more room to work with for the removable magazine.

Knextremely stupid (author)2015-08-07

Great gun and the range on that small a pistol is outstanding can't wait for more

Thank you so much! Yeah, with the decent pin pull and low friction on the ammo compared to a rod shooter, it can shoot pretty far. I have had good experiences with the orange connector and green rods ammo.

About This Instructable




Bio: I enjoy archery, knives, and building weapons. I used to build with K'nex.
More by CorgiCritter:Plastic Perfection Kap KarbineProject SlamFire.... With Video!
Add instructable to: