Introduction: UPDATE! Now With Video! Knex Handgun: Viper Instructions.

Picture of UPDATE! Now With Video! Knex Handgun: Viper Instructions.

I was finally able to get a video uploaded! A special thanks to my sister for her help. :)

When things get nasty, you can always rely on my new handgun, Viper.

Slim, good looking, and powerful, this is one of those guns that can be difficult to come by. Coming in at 11 inches, Viper is far from compact, yet it is still fairly light and is intimidating. there is little space wasted on goodies and features, but just because it seems bare-bones does not mean it sacrifices comfort or performance

The magazine is easier to load then its competitors, due to the magazine set up. Just drop the rounds in and band the magazine pusher. The handle is sturdy enough, and it is very comfy. Range is around 50 feet with two #64 bands, nothing to scoff at considering the direct feeding yellow rod magazine.

Viper has simple sights, not unlike those found on Lt. Licorice. The reliability is also very good. Trigger is very light, and pin pull is just right for a pistol, not so much that the pin bends like crazy, or too little so range is sad.

This is my favorite gun of mine I have built thus far, but it was not an easy build. All of the problems were with the front magazine wall. if it was too tight, the rounds would be hard to load. Too loose and the pin would miss some of the rounds. Not sturdy enough, and wall would blow up.

I had to disassemble the front at least 30 times, I broke three yellow connectors and a y clip by accident, I used up a foot or so of tape, and parts of the gun blew up at least 20 times. It consumed several hours of my life too.

When victory lies on the tip of a fang, you can be confident Viper will will pull you through... every time.

Pleas comment, favorite and subscribe. It means a lot to me.

Color and product may very. Do not modify ammo or ammo blaster. Accessorizes sold separately. Do not aim at eyes or face. Building Viper will not necessarily guar-antee victory. Yellow rods not included. Use at your own risk. Do not throw these warnings away. Limited lifetime warranty.     2015, CC Merchandise. 

Step 1: Important Note:

Picture of Important Note:

OK, before we get to the part list, go to this Pandora Internet Radio, sign up, and set up Scot Joplin, Classical for Studying, or Chopin radio. It will help with the build, I promise. As I write this I am listening to Pachelbel's Canon.

Now I realize that my tastes in music are probably much different then yours, so listen to "Rappin' Dude Man," or whatever floats your boat.

Step 2: Part List!

Picture of Part List!

Green rods: 120

White rods: 49

Blue rods: 6

Black rod: 1

Yellow con: 42

Green con: 3

Red con: 13

Grey con: 3

Orange con: 12

White con: 14

Blue con: 4

Full hinge: 3

Y clips: 10

Grey clips: 15

Ball socket half: 2

Tan clips: 3

Blue clips: 1

Blue spacers: 2

Cut white rods: 3

Cut rod end: 1

#64: 4

#32: 1

Total: 312 Pieces.

Step 3: Build the Handle.

Picture of Build the Handle.


Step 4: Build a Body Workshop.

Picture of Build a Body Workshop.

Welcome to the workshop, where plastic and birch plywood meet.

Step 5: Putting Together.

Picture of Putting Together.

This is where we go from a body and handle to a finished weapon.

Step 6: Banding and Shooting.

Picture of Banding and Shooting.

Read the image notes.


The Knex Inventor (author)2016-06-17

Also, this was one of the most comfortable K'NEX handguns that I have ever built!

The Knex Inventor made it! (author)2016-06-17

Made it a couple minutes ago. I only got mine to shoot 20 ft. straight, and 30 ft. angled, but I was only using two #64 rubber bands on the firing pin, plus I did not have a black rod for the firing pin. It would probably preform much better if I used a black rod, and if I used more rubber bands. In terms of looks, this gun gets an A+ from me. I love the futuristic look of it! Thanks for the awesome gun, CorgiCritter! Here is a picture of the finished product:

The Knex Inventor (author)2016-06-11

Superb! I will have to build this soon.

sandroknexmaster (author)2015-04-18


matthew9876 made it! (author)2015-04-10

I shortened the magazine and added a sight and longer barrel.


Cool! I like how slim it looks with the shorted magazine. How is it shoting for you?

Lucas The Boss made it! (author)2015-03-29

Dude I love this gun!!!!!!!!!!!

Yay! Looks really great, I like the sight you put on it. How does it shoot for you?

Very well, I'm getting about 50-60 feet jam free (I've had it built about 30 min and already have shot 100+ rounds)

Great! I got sixty feet sometime, but I posted the range most people would get with it. I have so many yellow rods it is addictive to shoot, I would gather sixty or so of them, and shoot them all, then find some more. The only jams I have had with it was when I dis not have enough band power, and even then it would not really jam, it just might not shoot out of the gun.

Lucas The Boss (author)2015-03-29

Dude I love this gun!!!!!!!!!!!!

gabe190 (author)2015-03-27

oh my gosh!!! ur puppy is soon cute!!! XD... nice gun dud

CorgiCritter (author)gabe1902015-03-27


Spock is so adorable, I mean your dog! XP Not Mr. Logical. XD

You just wanna squeeze him! :3

He gets squeezed more then any dog needs, anyway. :)

Lol I can imagine! :3

KnexGuy15 made it! (author)2015-03-26

Here you go.

CorgiCritter (author)KnexGuy152015-03-26

Thanks! It looks ok, I did not have the problem of the grey clip on the handle bending like that. Try to have the mag pusher band loose so there is not much pressure on the rounds. When I had it built, I believe that when I would try to use just one band and then it would not shoot or only shoot a couple of feet. It needs the right amount of power on the pin.

Wow! I just saw the video! That thing has a powerful shot!

Yeah! The vid has it with two worn out bands, but the trigger can hold at least four.

Oh well, your stuff is plenty good for the amount of knex you have. :)

JM1999 (author)2015-03-24

That's cool!

I love the video :D

CorgiCritter (author)JM19992015-03-24

Thank you!

JM1999 (author)CorgiCritter2015-03-24

Are you a PRO member yet?

CorgiCritter (author)JM19992015-03-24

Yep, three months for tapping the "Made it" button. :)

I have a feeling about what may be in the PM.

JM1999 (author)CorgiCritter2015-03-24

Well, I bet you will be wrong ;)

JM1999 (author)CorgiCritter2015-03-24

Well, that's really cool!

PM me when the three months is up ;D

CorgiCritter (author)JM19992015-03-24

I have a guess at what will be in the PM...

Lucas The Boss (author)2015-03-24

Dude nice video, could you tell us about the gun in the vid? Other than that, I'm definitely building it now just from seeing how much power it has.

Thank you! And no way, I am NOT talking in my videos. I tried that for Famine, but my camera made my voice sound like a 9 year old. It did not matter though, since I did not know how to upload videos.

If you have any problems with the gun, be sure to ask and I will do the best I can to help. LOL, I just failed building a pistol. It was sort of like this, but it had a mag pointing away from the handle at a 90 degree angle. I might post some pics of it in the forums, just because of how unique it looked. Never shot though. :(

KnexGuy15 (author)2015-03-23

Do you need the hinge in the handle?

CorgiCritter (author)KnexGuy152015-03-23

No, that is just the I set it up. The handle is easy to mod to your preference.

KnexGuy15 (author)CorgiCritter2015-03-23

Ok, thanks!

CorgiCritter (author)KnexGuy152015-03-23

No problem!

didexo (author)2015-03-22

It's okay.

CorgiCritter (author)didexo2015-03-22

Thanks? What about it do you not care for? It works as good as any of my other guns, if not better. LOL, just woundering.

didexo (author)CorgiCritter2015-03-22

It is kind of generic.

CorgiCritter (author)didexo2015-03-22

OK. I'm cool with that. But please show me 4 guns that look like it.

didexo (author)CorgiCritter2015-03-23

I'm not saying the looks are generic specifically. I just meant the gun overall is. Nevermind.

CorgiCritter (author)didexo2015-03-23

OK. Fine. :)

sonic broom (author)2015-03-23

I built it it worked nice i modded it to have an internal mag pusher. i don't have it any more i just need the parts for other projects.

CorgiCritter (author)sonic broom2015-03-23

OK, nice! How did it shoot? Was it reliable? Were the instructions good enough? Part count accurate?

sonic broom (author)CorgiCritter2015-03-23

The instructions where great. and the handle was nice! i did not shoot it that much but it worked good.

About This Instructable




Bio: I enjoy archery, knives, and building weapons. I used to build with K'nex.
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