Introduction: K'NEX Skunk Rifle

Picture of K'NEX Skunk Rifle
This instructable will build a model rifle that fires blue K'nex rods or wood dowels. The range and sturdiness of this model is amazing; shooting rods at up to 65 feet on a flat trajectory. This is a great rainy day toy to break out and do some plinking or trick shots.

This model shoots projectiles with potentially dangerous force. Please be mindful where you point the model, and do not aim at people or animals... unless a skunk is in your house...

Step 1: Aquire the Following...

Picture of Aquire the Following...

Before you you start you will need to have a few items. Some of these tools I list are subject to one's own preference, but definitely suggested. Please use caution and take your time during these instructions.

1. Large file folder rubber bands. Atleast one will do, but I would not do more than 3. At 3 bands it is awfully hard to pull back, and I cannot guarantee the safety and reliability after 3 bands!

2. A rubber band for the sear. This is the trickiest one to install, but is the highlight of the mechanism.

3. 2 rubber bands for the pin and pin guide. These are needed to strengthen and dampen the shock on the knex pieces.

4. At least 1 rubber band for the flip up sight.

5. Quality vinyl or electric tape. This tape is stretch taught and wound around itself. Good tape will stay taught when applied. This is crucial in our application.

6. Pruning sheers are the best tool to cut these knex pieces(in my opinion). It is a lot safer than any sort of knife.

7. Needle nose pliers are great for popping off stubborn pieces or snapping multiple knex pieces in a series. It is optional, but this will save your fingers immensely.

8. Lastly, not known below, is a flat metal file. This is used to shave our sear down just slightly to work efficiently under heavy loads.

Step 2: The Barrel Pt.1

Picture of The Barrel Pt.1

This is the beginning of the barrel. Blue spacers are used inbetween connectors of the same white rods.

Step 3: The Barrel Pt.2

Picture of The Barrel Pt.2

Using a long gray rod, you are filling in the gaps creating a "tube" barrel.

You will need to use 6 gray axle connectors and cut off half of the ring so that it looks like a "u" as opposed to an "o".

Pass a knex rod(preferably a white or blue rod) through this cut piece to ensure it glides smoothly through. If not, you may want to use a flat file to smooth the edges down.

Step 4: The Barrel Pt.3

Picture of The Barrel Pt.3

This is the front top of the barrel with the bullet catch using uncut axle connectors.

That black piece is a ball joint hinge used as a forward sight.

Step 5: The Barrel Pt.4 - the Sear

Picture of The Barrel Pt.4 - the Sear

Add the trigger now in this order so installing the one rubber band is not an issue at the end.

The trigger calls for a cut green rod and the shaved orange connector.

Step 6: The Barrel Pt.4 - Continued

Picture of The Barrel Pt.4 - Continued

From the trigger, add these pieces up top. The axle connector serves as the rear site.

Now remember the rubber bands we looped on the blue rod? Starting one at a time, pull them off and cross them over the top on the tan clips to the opposite hooking them on to the ends of the two yellow rods we just added.

Step 7: The Body Pt.1

Picture of The Body Pt.1

We move on to the frame. It is a shell type of construction, meaning there will be two outer pieces. This is one of the two sides.

Step 8: The Body Pt.2 - the Handle

Picture of The Body Pt.2 - the Handle

This is the next layer. We start working on the handle because it is easier to work from there forward along the barrel. Ignore obvious connections, orange connectors are inserted where you see the blue spaces later on.

Step 9: The Body Pt.3 - the Trigger

Picture of The Body Pt.3 - the Trigger

This is the middle layer that includes the trigger. Now you will be able to use the other half of that cut green rod shown in picture # 2.

The red connector + gray rod form the pin guide. This segment will fail unless reinforced! As found in picture # 5, you will want a rubber band wrapped around the base of the rod against the connector, and then wrapped tightly with vinyl tape.

This tape must be wrapped tight up to the connector where the rod meets the connector.

Pictured is a rubber band a little larger than what is needed. This wrapped section has been subject to over 100 pin strikes and I don't see the need to replace it yet. Considering how hard it is to break down to get back to this point, I would stress doing this right the first time.

Step 10: The Body Pt.4 - Body Continued

Picture of The Body Pt.4 - Body Continued

Three layers deep, the trigger is now sandwiched together and secure. In this step, we are filling in the foregrip part of the body.

The two rods forming in the back make the hand guard below the pin guide.

Step 11: The Body Pt.5 - Completed

Picture of The Body Pt.5 - Completed

The fourth layer here completes the main portion of the model, but we are only half done!

Step 12: The Pin

Picture of The Pin

The pin is made of 3 pieces. These pieces must be wrapped together for strength and survivability!

As seen in picture # 2, the longevity of your pin will be determined on how well you wrap it with the rubber band and vinyl tape. This pin here has seen almost 200 strikes.

Eventually your pin will need to be re-wrapped, but thankfully, in this model, you can easily release the pin to be serviced as you will see later in these instructables.

Step 13: The Stock Pt.1

Picture of The Stock Pt.1

The stock is more straight forward, but still just as many steps. The orange connectors are used as crossbeams. This helps lower the amount of blue rods as pins.

As you can tell, the firing pin guide can now be connected to the stock, and can be easily detached to remove the pin.

Step 14: The Stock Pt.2

Picture of The Stock Pt.2

Now the stock is being attached to the rest of the gun down at the bottom with the green connectors. It will be this way for the next two layers in these instructions.

Step 15: The Stock Pt.3

Picture of The Stock Pt.3

Just filling the shell, the same as previous step.

Step 16: The Stock Pt.4

Picture of The Stock Pt.4

More filling. Almost there!

Step 17: The Stock Pt.5 - Stock Completed

Picture of The Stock Pt.5 - Stock Completed

This completes the stock; however, there is one component left, the flip up sight. It is optional of course, but the flip up sight made the skunk rifle. With it, you can quickly aquire your target and is accurate between 15 to 25 ( I would use two bands to power the gun for increased range ).

Step 18: Flip-up Sight (condensed)

Picture of Flip-up Sight (condensed)

The flip up sight is held together by white rods. Don't worry if you see them slip as they are pinched by the inner layer and will never fall out.

You can use atleast 1 rubber band for the snap action. Loop them per picture # 5

Step 19: Charge Pin

Picture of Charge Pin
Picture # 1: Shows completed steps.

Picture # 2: Loop your rubber bands like so. It is important to stretch them evenly on both sides so your rubber band wears out over more of the band rather than one spot.

Picture # 3: the band runs along the top grooves of the gun that make up the barrel.

Picture # 4: Like # 3, this shows that the band runs under the bullet catch. This helps add tension to the round.

Picture # 5: Finally, these bands loop towards the end. Top most band loops on yellow, bottom bands loop to white rods.

Watch this video if you have not already to get acquainted with the Skunk Rifle. You will learn how to load it, and firing considerations.



MonkeyKnexer15 (author)2017-01-06

And make an instruction for the modded version. Can i do that too??

MonkeyKnexer15 (author)2017-01-06

hello, i want to ask you if i can mod this to have a magazine. is that okay??

Jamman01 (author)2013-06-12

nice! i'm gunna build dis thing

PotatoCoffee (author)2011-12-13

How did this get featured?

PotatoCoffee (author)2011-12-08


FlyingFish10 (author)2011-11-05

I don't see how you guys can only get a few feet off this gun. I built it, and functioning off of 2 rubber bands, can go through cardboard pretty thick. I love this gun, no problems.

Superpoopa (author)2011-02-06

mine only goes 5 metres

killersir751 (author)Superpoopa2011-08-11

The creators of the gun usually posts the maximum range they can achieve using that gun with the most powerful rubber/elastic bands that can get.
Every gun I buil, I build it because I think it looks good, strong and it looks like it can handle a lot of power

Senior Waffleman (author)2011-05-23

Well, the black joint has special purposes, and doesnt allow a smooth movement, changing the effects of this gun

worldofwarcraftfan (author)2010-12-03

A few good modifications to this gun would be a magazine/clip below the firing chamber so you dont have to reload the gun as often, a barrel that is about an inch longer, and a bayonet for when you run out of ammo, but other than that the gun is great. possibly the best K'nex rifle I've seen on instructables.

Think about it, if you have a mag, there is friction because of the other rods when you are shooting, with a single shot with rechamber, there is no friction, leaving much more room for power, speed, and performance, adding a clip would completely destroy the purpose of trying to have a gun shoot such a distance, and the longer the barrel, the more the bullet has to fly and actually leave the barrel, and slowing it down, so this gun doesnt need modifications, just though i would through that out there for you =)

Senior Waffleman (author)2011-05-23

Is that a remix of D.A.N.C.E by justice?

Superpoopa (author)2011-02-06

the trigger isnt blocking the ramrod please answer ASAp I WAnt to build this gun sooo badly but the ramrod keeps sliding through the trigger

sammyrs2000 (author)2011-01-16

that is minted

superbestknex (author)2010-11-29

wow thats cool do we have to decaatate our peices

shieldsam (author)2010-10-04

can someone post a list of pieces it uses?

what pieces do you have to decapitate

killersir751 (author)shieldsam2010-11-13

6 greys or 3 orange longer connectors

Orange Oz (author)2010-09-18


Knex Guru (author)2010-09-12

Looks like the Fallout 3 Lazer Rifle

JonnyDude2008 (author)2010-09-11

haha he says up to 65ft and when he aims it in the vid hes aiming 10 ft above the target

Orange Oz (author)2010-08-29

how do you make those 3d pictures???

trebor11 (author)2010-08-28

awesome gun dude 5* i have an extended barrel on the front and it shoots alot further

azazaz (author)2010-08-26

the same thing happened to me. all you have to do is file down the orange trigger connector a bit more and it works fine.

LinkEdward (author)2010-08-26

Hi thenks for the ible mrdradicaled I built it, but now when I have 2 or more bands the trigger doesnt work. one works fine, but then i add a second and now matter how hard i pull the trigger, it doesnt work. there's too much pressure on it because when i pull the pin back a little more it works fine. any way to fix this? thanks guys.

azazaz (author)2010-08-25

wow! 5*'s. I built and it works great. worth the few decapitated pieces.

F-17 (author)2010-08-24

pretty cool!

Seleziona (author)2010-08-22

That is REALLY cool! 5* for you! I might build!

RAM123 (author)2010-08-21

Built it, it's amazing powerfull :) You need some strong rubberbands though.

noahlankford (author)2010-08-09

I wonder if theres any way to mod it so it has a magazine..

That would be sweet!

Atomic_Sparkz (author)2010-08-06

I built it and i am so happy! TY :3

Oblivitus (author)2010-08-04

What program did you use to make the 3d model? Is it a newer version of mlcad?

MrRadicalEd (author)Oblivitus2010-08-06

Yup it's sketchup. The pieces I use were modeled by Imperar. They are not as exact as I'd like. Not all the ends of connectors meet flush as they should, but they are so close to the original. My attachment points that I use are the middle of rods and the inside middle of connectors as those are 100% accurate. Double click a group to highlight those pieces within the whole model for those perspective pictures.

advinator (author)Oblivitus2010-08-05

Google sketchup

CuddlesMcT (author)2010-08-01

Sexy gun! A magazine would be pretty nice XD.

Mr. Muggle (author)CuddlesMcT2010-08-03

with a magazine the whole point of the main mechanism is gone!

CuddlesMcT (author)Mr. Muggle2010-08-03

True but i just dont like having to manually reload a round into the chamber everytime. Everyone has different tastes right? :D

MrRadicalEd (author)CuddlesMcT2010-08-03

You are correct. I think if you like the idea of taking your time with shots than this will be fine for you. I will say I am already at work with another project that will utilize a magazine, and inspired by popular QCB guns.

What is a QCB?

I'm sorry, I meant CQB! Think of the MP5 Navy or Kriss Super V. I will make a post on the forums when I have something presentable.

heatblast (author)TwistedParadox2010-08-06

you mean CQB. it means close-quarters-battles. :p

heatblast (author)heatblast2010-08-06

I would also not recommend this gun for CQB.This gun is mainly for fun.An example of that would be the Z-35 Assault Rifle by Oblivitus,as it only gets 40 ft of range.An example of a REAL CQB gun would be the D-TAB by Kinetic. That gun gets around 55-60 ft with normal ammo and 300+ft with fin ammo.That gun is SCARY 'cause the 1st time I built it, I shot it in my room and it started putting holes in my bedroom wall.Red rods would also go clean through a 1/4" sheet of pine wood.The Untangle could do the same or even WORSE with fin ammunition.There's several CQB guns I know of,but I can't help you find 'em mate.Sorry. I would just spoil the fun if I did.I'm afraid you're on your own turf now.

CuddlesMcT (author)MrRadicalEd2010-08-03

Nice...btw i dont hate the gun just because it doesnt have a magazine. I wish i had the ability to make guns that go past 40 feet lol. 5 stars BTW!

TheFoofinator (author)2010-08-06

Cool, a breath of fresh air for the guns! Finally someone who isn't obssesed with power, range, turrets or all that KI nonsense. Just a simple, honest, eas,y brilliant Knex rifle, this is what everyone should do! The Ible is extremely well though through as well, a definate 5*

knexrock44 (author)2010-08-04

dude please reply what program did you use to make the steps

stubbopolis (author)2010-08-04

sweet looks! i would make if i had enough pieces

knexsuperbuilderfreak (author)2010-08-03

nice gun! i should make some time

knex gun builder freak (author)2010-07-29

Looks cool.

~KGB~ (author)2010-07-29


~Aeronous~ (author)2010-07-28

Thank you for putting the instructions in MLcad. Looks great for a singleshot, but I can see a tonne of ways it could be improved. Perhaps make a V.2.

About This Instructable




Bio: I am obsessed with design...
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