Knetix semi auto knex gun

This knex gun is different from other semi auto guns because instead of using manual power to pull back the pin, the tension of wound rubber bands is used, making the trigger easier to pull and very unlikely to break when you pull it.

I give credit to extreme builder for the pullback mechanism (the black wheel)

I also give credit to revtiedye for the trigger and placement of the band wheel

Pros:
Semi automatic
Very sturdy
Shoots farther than most semi auto guns (about 15 feet)

Cons:
Needs to be wound every few shots
Does not shoot as far as a pull-back gun would

ENJOY!

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Step 1: Frames and main supports

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The body frames and mandatory supports of the gun. This step also includes the safety lock

Step 2: Firing chamber and magazine

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The firing chamber is my original design. The magazine feeds straight into it so it there's no little crevice for rods to get jammed in. This also includes the mag ram.

Step 3: Sight

The sight of the gun-sight also functions as the band guide

Step 4: The guts

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These are the innards of the gun. This includes the pullback mechanism, the band wheel, the trigger, etc.

Step 5: The butt :)

The butt... a really easy step

Step 6: The firing pin

This is the firing pin that extreme builder used-i modified the tip a little to decrease friction.

Step 7: The chain

This is the big chain that you see on the side of the gun. If you find out a way to replace the chain with gears without getting in the way of the other parts please tell me-the chain causes a lot of friction that makes it harder to pull back the pin.

Step 8: Attaching the guts

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This tells you where to put all the innards. This does not include the outer gears

Step 9: Attaching the gears and chain gears

Picture of Attaching the gears and chain gears

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The outer gears and chain gears of the gun.

Step 10: Adding the rubber bands

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This is where the rubber bands go

Step 11: Optional supports

The optional supports. I would use them but you dont have to

Step 12: Winding, loading, and firing

You are done!!! It would be best to use a piece of surgical tubing as the wheel bands because it is stronger and thicker, so it is less likely to get jammed.

LvNo100011 months ago

Why isn't "requires a bunch of broken pieces" in the cons list? It would have been nice to know that before I got nearly half-way through making it and realized I wasn't willing to break that many pieces to make this.

TheRacker2 years ago

Kind of obsolete now, isnt it?

Football viking boy3 years ago

only shoots 15 feet????? there are a lot better semi auto guns

Kinetic (author) Football viking boy3 years ago

Hmmm...this gun is three years old maybe? And yeah there are but they're pseudos. If you want to see an amazing semi auto check out my forum semi auto. Not sure when it will get posted though because it still needs work.

Crumble3 years ago

is there an easy way to break the grey connector in step 1 pic 9?

slippdiddy3 years ago

AMAZING!!! i love it..... im building one but it has a second ram rod (or fireing pin) that smashes in to the firing pin to pull it back after you shoot, then on your second shot you pull the same trigger but it uses a different mech.... and there you have a semi auto..... but it only shoots two times then you have to cock it (so its not true) :( but i still like it and im getting close (im just on the concept) ....... awesome gun

slippdiddy slippdiddy3 years ago

here it is --->> http://www.instructables.com/id/Semi-auto-knex-assault-rifle-SAKAR/ still not realy working :(

glugnar3 years ago

looks awesome

Michaelgoode4 years ago

Is there a video of the gun shooting?

An Villain4 years ago

my rating boosted it over 4*

Madrias3574 years ago

I have a method to rid yourself of the chain. Use the little sized k'nex wheels, and a rubber band.

Kinetic (author) Madrias3574 years ago

Maybe-it might not grip well enough though. Good idea however.

Senior Waffleman4 years ago

you seem to use the same stock and handle in ur guns

KnexFreek4 years ago

it looks really cool :) !!!

Kinetic (author) KnexFreek4 years ago

Thanks

devon344 years ago

its good but your handle is a bit rubish

Kinetic (author) devon344 years ago

What makes you say that? Works perfectly for me. And if you have a problem with it you can easily mod it to fit your wants.

devon34 Kinetic4 years ago

i havent made it but it looks a little bit fimsy

Kinetic (author) devon344 years ago

It actually works fine, since it is 5 layers thick.

devon34 Kinetic4 years ago

is it powerfull and what does the chain do

Kinetic (author) devon344 years ago

The chain connects the band wheel (where the energy is) to the firing pin. It gets about 10-15 feet.

GeekBeam4 years ago

how many and what pieces do you need

Kinetic (author) GeekBeam4 years ago

Sorry man this gun was taken apart a long time ago. I have no idea.

Knetix5 years ago

hey ppl sry i havent been answerin any questions-i lost my old account (kinetic) so i see that there is a lot of controversy about this gun. Yerjoking-i lookd @ ur profile and i dont c any semi autos at all so dont be trying to compare us-and also-oodas semi auto inst really a gun-more like a handheld cannon-guns use triggers, not levers-of course u can get more power uf ur usin ur whole arm instead of just ur fingr-no offense 2 ooda- its still a great design

GeekBeam Knetix4 years ago

oh no need to worry it happens from time to time, sucks when you have a good account going ,and *poof* it's gone

Kinetic (author) GeekBeam4 years ago

Actually I just couldn't remember the password but I figured it out afte a while thank god lol

DrWeird1175 years ago

Damn it! This is cool, and new. Why so many complaints?

DJ Radio DrWeird1175 years ago

because ppl think its not TSA

DrWeird117 DJ Radio5 years ago

They should actually build it.

GeekBeam DrWeird1174 years ago

duh they need to build it before they critique it im going to do so later on

Fred the Penguin5 years ago

my revolver is probably one of the closest guns to semi auto it uses a sharpened ball connecter to hit the white rod in the bullet holder of a rotary drum, it uses a hammer to help this and all 8 shots can be pulled in under 5 seconds heres pic:

Fred the Penguin Fred the Penguin5 years ago

revolver

GeekBeam Fred the Penguin4 years ago

ooh aah cool looking gun man

Knetix Fred the Penguin5 years ago

u should post it--i would build it

GeekBeam Knetix4 years ago

me too

yerjoking Fred the Penguin5 years ago

It's not the closest to a semi auto, we have semi auto's already, lol. Never seen a fully working semi auto revolver yet, only seen certain parts.

DJ Radio yerjoking4 years ago

Combine BRv1 turret with Ednator 55's semi auto mech.

Kinetic (author) DJ Radio4 years ago

Thats actually a really good I'm going to try that some time.

yerjoking DJ Radio4 years ago

Then you have a gun which will shoot even worse than the original gun.

DJ Radio yerjoking4 years ago

Yeah, but semi autos are not power guns, but concept guns.

yerjoking DJ Radio4 years ago

But you want a gun that can shoot atleast 10 feet with semi auto.

agent harmsy4 years ago

OH COME ON! I built the entire gun, up to adding the gears, only to find I CANT FINISH IT BECAUSE I ONLY HAVE ONE GOLD GEAR! Epic failed.

GeekBeam agent harmsy4 years ago

hey dont you have a grey gear that doesnt attach with tan locks like the other gears(its one of the earliest gear types knex made)

Kinetic (author) agent harmsy4 years ago

thats horrible-it might work with just one but if might break

agriff5 years ago

what is the chain made of?

chazman2 agriff4 years ago

der its knex

caebersbach agriff5 years ago

Plastic K'nex chain pieces

squarepants4 years ago

the handle looks kinda unfinished with the white rods stickin out

Kinetic (author) squarepants4 years ago

na i do that on purpose-i just like it that way you can build it however you want though

squarepants Kinetic4 years ago

thats a nice idea-built it to suit you.

beameron5 years ago

Heres an idea Iff u connect 2 of those pull back things for the trigger. U can make it pull back further xD

yerjoking5 years ago

Still not true true semi auto, it needs elastic bands to fire bullets.. STILL, good gun, 3 stars 'cause I thought it was true semi auto.

Kinetic (author) yerjoking5 years ago

what do you mean 'it needs elastic bands to fire bullets" ?

yerjoking Kinetic5 years ago

The elastic bands hit the ram and the ram makes contact with the bullet, and then you need to "Re-wind" the gun, unlike a true semi aut where you only have to put the mag in then pull the trigger.

SonicX 22 yerjoking5 years ago

Extreme builder made a true semi auto exept it has a built-in magazine

yerjoking SonicX 225 years ago

I made one with a removeable bottom loading mag, lol.

SonicX 22 yerjoking5 years ago

cool i wish i could see it

yerjoking SonicX 225 years ago

It wan't that good, shot 15 feet max, and prone to jams, due to the mech. I do plan to make a v3 that shoots discs though.

SonicX 22 yerjoking5 years ago

yerjoking SonicX 225 years ago

Was still tru semi.

Kinetic (author) yerjoking5 years ago

ya-but unlike a regular gun, u can wind it multiple times, giving you multiple shots before rewinding

yerjoking Kinetic5 years ago

So? My semi auto, and Ooda's Semi auto's don't need winding, BUT, I like your gun, and you did a fine job with the new mech, maybe someone could make it fully auto...

Ltcheesecracker yerjoking5 years ago

it is too true semi auto! is shoots every time you pull the trigger! T-R-U-E S-E-M-I-A-U-T-O!! 5*

yerjoking Ltcheesecracker5 years ago

No, it really doesn't, if it needs "winding" then it ISN'T SEMI AUTO. Don't tell me it is, and I changed it, I rated it a 4 'cause of the design. Not true semi auto, but a good idea.

CrazyCHRIS!!5 years ago

I thought it fired rods!

Knetix CrazyCHRIS!!5 years ago

it does-u need help?

erikos kostarikos5 years ago

the instructale is nice, but this is still not a semi auto. maybe with some more knex you can make the look of it better. its just an idea. well done 4*s

lilrou155 years ago

cant you just use a gear to turn the chain not a snowflake?

Kinetic (author) 5 years ago

does anyone know if its possible to upload videos without using a link to another site?

DJ Radio5 years ago

may build sometime. 5*, and faved

Kinetic (author) DJ Radio5 years ago

sweet thanks-if u build it tell me n e mods that u made-especially ones having to do with the way that the rubber bands wrap around the band wheel-the most ive been able to wind it is 2 times so far

ILIKEPIE333 Kinetic5 years ago

what is the wheel with the chain for?

Kinetic (author) ILIKEPIE3335 years ago

it connects the pullback wheel to the band wheel. I couldnt use gears to connect the pullback wheel and the band whheel because they would get in the way with the inner parts of the gun

ILIKEPIE333 Kinetic5 years ago

ok, thanx

DJ Radio Kinetic5 years ago

ok.

ajleece DJ Radio5 years ago

DJ..... why do you give him false hope.... we all know you dont have enough peices to build

DJ Radio ajleece5 years ago

ill get enough parts sooner or later....

King_Banana DJ Radio5 years ago

banned? Huh?

Knexwizard5 years ago

I was thinking of making it but I want to see it in action.

agent harmsy5 years ago

wow! I like it cos it lookes so... eccentric, but a video of how it works would be reeeealy nice. I dunno if I wanna commit the pieces until i see it in action. I'll give it 4*, with a 5* rating if you upload a video.

Kinetic (author) agent harmsy5 years ago

k-it does use a lot of pieces and it was mostly made just for the purpose of being semi-auto, so it doesnt shoot as far as a regular gun does, but ill try 2 post a video 2 persuade all u ppl

agent harmsy agent harmsy5 years ago

hmm, I won't make it yet... too many broken + modified pieces! but if you get that video up, I could well change my mind...

codemaster25905 years ago

can you explain the gear system more. With all the gears and chain i dont see how it works?

Kinetic (author) codemaster25905 years ago

sure-when you pull the trigger, you allow the band wheel to rotate once. when it spins, it turns the other gears that connect to the chain. since it is connected to the pullback wheel, when the chain spins it causes the pullback wheel to spin. the teeth on the pullback wheel use the spaces in the firing pin to pull it back as it spins, and then it fires. it happens really fast when you are actually shooting the gun but thats how it works.

Knex_Gun_Builder5 years ago

5 stars and favorite

Kinetic (author) 5 years ago

sweeeeeeeet

pls5 years ago

Looks interesting, 15 ft for a semi auto i think is great! Video would be awesome aswell!

Kinetic (author) pls5 years ago

ya-ive gotten that a lot about the video-ill post one soon

pls Kinetic5 years ago

yaaaay!

Oblivitus5 years ago

Looks interesting, I see that you have a semi-auto cog mech and I think that is a reseting firing pin, but I still don't understand how it works so please post a video!

Kinetic (author) Oblivitus5 years ago

Ya that would help-u just dont hav n e gears left so i wont b able to work on that now-ill post as soon as i figure it out

Kinetic (author) Oblivitus5 years ago

k ill try 2 get one up-it works cause wen the trigger is pulled, it allows the band wheel to be turned by the bands and that in turn spins the pullback wheel, pulling back the pin and releasing it

Oblivitus Kinetic5 years ago

Ahhh, okay, I have an idea to improve in that case, if you put a wheel on there, you can wrap elastics around it, allowing you to get many more rotations per elastic that you use.

Kinetic (author) 5 years ago

(removed by author or community request)

The Jamalam Kinetic5 years ago

reply to comments bly clicking reply, dont post a new comment

Kinetic (author) The Jamalam5 years ago

ya... my bad (^.=.)

The Jamalam Kinetic5 years ago

extreme builder5 years ago

very cool and thanks for some credit but we need a video like i did

Knexwizard5 years ago

do you have to breack this piece

Kinetic (author) Knexwizard5 years ago

o that one-i guess you dont really have to, but breaking it allows it to move up more, allowing it to have a better hold of the pin while you r winding

Kinetic (author) Knexwizard5 years ago

which one?

Kinetic (author) 5 years ago

ok ill c if i can get one up

I_am_Canadian5 years ago

We need a videa!

MI65 years ago

V. complex but i still like it a lot

knex_builder_freak5 years ago

This is very cool! But I wont be building it. 41/2*s!

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Knetix semi auto knex gun

Step 1: Frames and main supports

Step 2: Firing chamber and magazine

Step 3: Sight

Step 4: The guts

Step 5: The butt :)

Step 6: The firing pin

Step 7: The chain

Step 8: Attaching the guts

Step 9: Attaching the gears and chain gears

Step 10: Adding the rubber bands

Step 11: Optional supports

Step 12: Winding, loading, and firing

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Knetix semi auto knex gun

Intro: Knetix semi auto knex gun

Step 1: Frames and main supports

Step 2: Firing chamber and magazine

Step 3: Sight

Step 4: The guts

Step 5: The butt :)

Step 6: The firing pin

Step 7: The chain

Step 8: Attaching the guts

Step 9: Attaching the gears and chain gears

Step 10: Adding the rubber bands

Step 11: Optional supports

Step 12: Winding, loading, and firing

Step 1: Frames and main supports

Step 2: Firing chamber and magazine

Step 3: Sight

Step 4: The guts

Step 5: The butt :)

Step 6: The firing pin

Step 7: The chain

Step 8: Attaching the guts

Step 9: Attaching the gears and chain gears

Step 10: Adding the rubber bands

Step 11: Optional supports

Step 12: Winding, loading, and firing

About This Instructable

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About Us

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