Introduction: K'nex Fully Automatic Burst Rifle: the K-2 V.2

Picture of K'nex Fully Automatic Burst Rifle: the K-2 V.2
An improvement on my second in a series of new and innovative concept guns, the K-2 v.2 is very much unlike any other K'nex gun out there.  I utilizes a new "two-stage" pump that only activates the rifle's hammer when it is being pushed, and deactivates when the user is resetting the pump. 

The new pump was originally designed to rotate a cog, however until recently, a cog  with the right diameter to fit in with the teeth of the pump had been eluding me, and so this rifle works with the pump in direct contact with the hammer.  I intend to continue work on a v.3 that will utilize a traditional pump as opposed to a handle pump, and my hopes are that in doing so I will be able to make the gun more compact and more efficient.

The difference between the v.1 and the v.2 is merely the hammer, but a large part of the gun had to be altered as well to accommodate the hammer.  The original hammer extended a mere 3cm from its axis of rotation, limiting the distance it had to accelerate.  This hammer also had the design flaw of being at an angle, directing a lot of its force down rather than straight into the projectile.  The new hammer extends 6cm from the axis of rotation, doubling the distance it has to accelerate, and also contacts the projectile straight-on, ensuring that all of its force is being transferred to the projectile.

So, back to English.  I've put a lot of effort into this project over the past week or so and I feel that this is a very high performance gun.  Although the mechanism has still not been used to its full potential, it is definitely a post-worthy gun and instructions are on their way.

*UPDATE*  Instructions for this gun can be found here: 

Without any further ado, say hello to the K-2 v.2:


H1T4TCH1 (author)2013-12-11

" The new hammer extends 6cm from the axis of rotation, doubling the distance it has to accelerate, "

Isn't it, in that case, quadrupling the distance it has to accelerate?

Villobuilder (author)2012-10-02

that is a awsome gun !

benjiman345 (author)2012-09-04

hi guys great gun looks awesome can you please look at my first one too though i would really appreaciate

knex freek 2 (author)2012-08-25

hay if you guys like guns look at mine

Only if it was ''yours''. You posted The Dunkis' BAW, claimed it was yours, and didn't give any credtis.

PotatoCoffee (author)2012-08-23

It's an awesome gun. Nuff said.

Kinetic (author)PotatoCoffee2012-08-27

Thanks a ton man! I just hope someone might be able to improve upon the concept sometime.

PotatoCoffee (author)Kinetic2012-08-28

Umm... Please don't look at me, I can't do it yet! =(

Kinetic (author)PotatoCoffee2012-08-28

Sure you can!

PotatoCoffee (author)Kinetic2012-08-29

First I'll need to get some more peices!

knex freek 2 (author)2012-08-24

what is the name of the song in the beging

Kinetic (author)knex freek 22012-08-27

It's called Strange Clouds. And yeah I'll make sure to check out your stuff!

Btw thanks for the sub!

Kinetic (author)2012-05-02

*UPDATE* All pictures have been taken. Instructions will be posted in segments throughout this weekend until the whole gun is posted.

DJ Radio (author)2012-04-27

I've said this before but I think this is an amazing build. Definitely the best gun of 2012 in my opinion.

Kinetic (author)DJ Radio2012-04-28

Thanks a ton man. Instructions will be up sometime this week along with photos of a cool mechanism I've been experimenting with. As good as this gun is, I really hope the community can improve upon it because I think it even more potential.

Kinetic (author)Kinetic2012-04-28

*it has even more potential.

GASSYPOOTS (author)2012-03-24

by deffinition a automatic is a semiauto gun that shoots pistol rounds XD

mahmel (author)2012-01-24

Sorry for being trolly but I can not say this is full automatic

Kinetic (author)mahmel2012-01-26

Hmmm...I was waiting for someone to say that...would you consider a m4's 3 round burst as automatic fire?

mahmel (author)Kinetic2012-01-26

I suppose. I see it actually as a semi automatic rifle with 4 triggers:) If I counted right..

Kinetic (author)mahmel2012-01-26

But you only have to pump it once...not four times. Its basically just one really long trigger pull.

mahmel (author)Kinetic2012-01-27

Ok, it's not full automatic to me; still an awesome gun!

Hunting Rapt3r (author)mahmel2012-03-06

well full auto is hold a trigger down and it shoots but this is a working knock trigger because you have to pump it inorder to shoot it so its sadly not a full auto knex weapon sorry

mahmel (author)Hunting Rapt3r2012-03-07

yeah, that's kinda what I mentioned

Hunting Rapt3r (author)mahmel2012-03-07

just wanted to back u up

mahmel (author)Hunting Rapt3r2012-03-08


apples!!!!! (author)mahmel2012-03-10

If it matters, you're right for the most part.

mahmel (author)apples!!!!!2012-03-10


mulletman6 (author)2012-01-21

Awesome gun dude. You really are one of the best "knexers" on here :)

legoalien2000 (author)mulletman62012-02-27

I think that the word you're looking for is "k'nexpert".

Kinetic (author)mulletman62012-01-21

xD Hows the K-1 coming? Do you still need better pics of the "power pack"? I read what you said about the band stretching too much before it is wound, and that's because I used a rubber band that is twice as long as a standard one, so if you can find those use them or try tying two together.

mulletman6 (author)Kinetic2012-01-22

Got it finished, so don't need anymore pictures - thank you anyway :). I will try a different sized rubber band on it. Will keep working on it and see what i can do :)

Kinetic (author)mulletman62012-01-26

Great job man! Hope you can do something amazing with it.

pokerface1 (author)2012-02-21

Again super great weapon
I rated 5* :)

You always have great idea's your guns are always great, I have builded all your weapon u posted so far and i like all of them

Thanks for explaining vid, it realy helped me to understand.

Keep on going with this great work :)

H1T4TCH1 (author)2012-02-05

Awesome man, Awesome.

Raz1r Knex Bull3t (author)2012-02-01

When are you going to post?

tytiger33 (author)2012-01-31

When you going to post this?

Dirtyboyy (author)2012-01-30

Dude keep going! It's great! If you could get the same range as the original TR18.. your gun will be awesome! Try to make the gun bigger! I mean a top layer or whatever.. make a beast! Or make it as small as possible with the same range.. You are on the good way! Keep going!

patriots8888 (author)2012-01-28

This is no joke the coolest gun I've seen on instructbales. I would pay for instructions

Raz1r Knex Bull3t (author)2012-01-27

How's the 18 shot turret coming along with the gun?

JSF521 (author)2012-01-27

Can you please post this???
Even if it is not perfect, the rest of us would really like to
re-create you great work! ;)

dutchwarlord (author)2012-01-22

nice gun.

also nice headphones, skullcandy avaitor. am i right?

Kinetic (author)dutchwarlord2012-01-23


And hell yeah. Better than beats any day.

dutchwarlord (author)Kinetic2012-01-23

the thing by beats is that the price is to high for what they do.

beats can go from 12HZ to 20000HZ when pioneer or skullcandy"s can produce more for less

DJ Radio (author)2012-01-23

This is incredible.

DracoUltima (author)2012-01-21

5* Amazing work, keep it up! This is a gun that has the potential to change the K'nexing community!

Kinetic (author)DracoUltima2012-01-23

Thats my hope!

Zuckey (author)2012-01-22

Omg you're a good "knexers" 5 stars !

I_am_Canadian (author)2012-01-21

Beauty! Fantastic as always Kinetic :-D

Kinetic (author)I_am_Canadian2012-01-21

Thanks man. And I haven't seen a gun out of you in a long time...whats going on???

About This Instructable




Bio: Sometimes it takes a man to push beyond what he thinks is possible before he realizes that possibility is a mere conception of the mind ... More »
More by Kinetic:The Kinno-2: A Semi-Automatic K'nex GunThe Kinno-1: K'nex Semi Automatic Rifle (preview)The Kinetic Sling Pistol (KIC2 contest entry)
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