Knex Gun: The Kinetic Rifle

 by Kinetic
Featured
Hello K'nex community!

The Kinetic Rifle is finally here!  To those of you who have been waiting since christmas for me to post this I'd like to say that I'm sorry it couldn't have been posted sooner...I simply have too much going on in my junior year in high school.  For those of you that this gun is new to, here's a description of the gun and how it works:

This gun is a bullpup, horizontal magazine, pump action, sling semi-repeater.  Quite a mouthful.  The term semi repeater means that it requires two actions to load it: pulling back the band and then pumping it, rather than simply pumping it, although it has a 4 shot horizontal magazine, meaning you don't have to manually load each shot.  My emphasis on this gun was to prove the potential that horizontal magazines have, and the plain coolness of the mechanism.

So I hope you guys enjoy it and I know a lot of people have been leaving recently so I'll just say this: K'nex is not dead, innovation is just currently at a standstill.  If you decide to leave, your going to have the most amazing idea sooner or later and your going to want to come back.  There is so much left to be discovered!

*This is an extremely complex build and pictures and image notes must be followed exactly for the gun to work.  Everything is the way it is for a reason.

PROS:
100ft+ range (the ratchet can hold pretty much any amount of tension so it's hard to say the exact range)

Pump action!

Much quicker reload than other slings

4 shot H-mag

Sweet reloading and firing system

Just an amazing gun

CONS:

A little too big for some

Slow reload compared to conventional repeaters

 
Remove these adsRemove these ads by Signing Up
1-40 of 132Next »
TLF93 says: Mar 21, 2013. 8:27 PM
nice gun i like it and you should try building a bullpup shotgun like this cause i've been wanna to build a shotgun that is realistic
kellykell says: Jul 2, 2012. 6:40 PM
Im going to be stocking up on knex pieces how many green rods are used for this instructable.
Knex.X says: Jan 6, 2012. 5:40 AM
wow......
always wanted a slingshot with a mag......
ITS AWESOME
and i'm glad knex is not dead
Kinetic (author) says: Dec 10, 2011. 8:52 AM
Oh cool it got featured xD
PotatoCoffee in reply to KineticDec 28, 2011. 10:20 AM
Good job!
H1T4TCH1 says: Dec 17, 2011. 5:34 AM
Hi Kinetic.

I just finished the gun, and I think it's awesome, but I haven't got it to shoot.

The main problem occurs at the horizontal mag pusher(s). The two long sticks existing out of green rods and orange connectors that push the bullet into the receiver when pumped. These two sticks are not able to move forward without problems and the reason for that is, that they are blocking against the receiver part. They can't separate and move forward, they actually go to each other is some sort of way so that they can't move the bullet to the receiver.

So actually, they collide with the middle layer of the gun.

I don't think I explained it too well, so tell me if you don't understand and I'll take the time to explain even more.

Greetings, H.
H1T4TCH1 in reply to H1T4TCH1Dec 17, 2011. 7:59 AM
I can make a video if you find my explanation not clear.
H1T4TCH1 in reply to H1T4TCH1Dec 17, 2011. 11:54 AM
I fixed the problem, but now I have a new problem with the lift. I can't get the right balance between the amount of rubberbands on the lift and loading all ammunition into the receiver without pushing the lift forward. When I put too many bands on the lift, it will screw up the internals in the stock, BUT then all the bullets will be loaded into the receiver automatically. When I put too less bands on the lift, the internals won't screw up, but I will have to push the lift forward manually when I shot out 2 bullets.

I followed the instructions and I have seen your placement of the rubberbands, but if I do it your way everything screws up.

Please help me.

Greetings, H.
Kinetic (author) in reply to H1T4TCH1Dec 18, 2011. 5:08 AM
I dont know what you mean by "pushing the lift forward", the only direction it should be able to move is up and down. Just make sure there are enough bands on the lift to bring it up and when you pump it, do it quickly so the bullet doesnt have time to slip up at an angle, which could allow two shots to feed instead of one.
H1T4TCH1 in reply to KineticDec 18, 2011. 12:06 PM
No, that's the receiver what you're talking about.

Search for step 2 pic 17. That's the lift... Now I see it's called the mag pusher in your I'ble but somewhere else in your I'ble you called it the lift... So I was kinda confused...

But still thanks, your hint of pumping it quickly is useful.
bruno mars says: Dec 16, 2011. 10:15 AM
realy cool
laserbeam says: Sep 22, 2011. 12:15 PM
im short on blue clips. i used all mine on the kls. is there any alternative.?
Lego Manic in reply to laserbeamDec 8, 2011. 5:43 PM
take apart your "kls"
cool knex13 says: Dec 5, 2011. 10:21 AM
GREAT!
Puddock says: Dec 4, 2011. 11:17 AM
I actually get how this works. Great job!
monsterlego says: Dec 3, 2011. 6:18 PM
Sickomatic.
PotatoCoffee says: Dec 3, 2011. 2:47 PM
Astounding!
the dashing hero says: Dec 3, 2011. 10:02 AM
*crowd* COOL! EPIC! ASTONISHING!
I_am_Canadian says: Dec 3, 2011. 7:42 AM
Outstanding, as usual :-)
slimshaddy says: Dec 3, 2011. 6:28 AM
nice gun 5 stars
LiquidMalisha says: Sep 30, 2011. 6:09 AM
Can someone plz draw a picture in paint or sumthin so i can get an idea or how this gun works. cant build it. :'(
The Chunky Sniper! in reply to LiquidMalishaDec 3, 2011. 3:56 AM
That wouldn't take ages like!
ilpug says: Dec 2, 2011. 11:56 PM
I know nothing about Knex guns, but this one looks markedly different from others I have seen.

Keep up the good work!
cazadactle says: Nov 14, 2011. 8:02 PM
just epic. end of story.
pokerface1 says: Aug 19, 2011. 9:54 AM
I did try to find how many green rods it uses and i found it in the comments.
Around the 1000 I read there. I only have like 850 green rods. from the rest of the pieces i have more then enough. btw still great gun.
pokerface1 in reply to pokerface1Aug 23, 2011. 11:37 AM
Are you sure that you have to use around 1000 green rods cuzz i want to build it. plz reply soon. and your KLS v.2 I made is realy great i modded it a little for longer mag and that it also shoots flat without less elastics.
ToolTech says: Aug 12, 2011. 6:00 PM
I cant see picture 26 :s
ToolTech says: Aug 12, 2011. 4:56 PM
man this is an itch to build ;) But I love it! this step killed! haha
bullet tooth chris says: Aug 6, 2011. 5:34 AM
Awesome 5* I would build but I just don't have the pieces, I am going to build the mini one do you just pull the trigger to fire that one or is there a pump like this one
KnexMaster7000 says: Jul 11, 2011. 11:42 PM
ran out of green rods on the last step:(
Kinetic (author) in reply to KnexMaster7000Jul 18, 2011. 6:38 PM
That suckssss :( maybe you can make the barrel a bit shorter?
lemonpickle says: Jul 6, 2011. 11:56 AM
i love it
Danielzxzx1 says: Jun 29, 2011. 12:58 PM
How many green rods do you think this needs?

Also, I might use this for a target that is 20 feet away. Would it be able to go through cardboard that is 20 feet away?
Kinetic (author) in reply to Danielzxzx1Jun 29, 2011. 6:28 PM
Probably about 1000 green rods. The ammo won't pierce cardboard it will just explode.
Danielzxzx1 in reply to KineticJun 29, 2011. 8:21 PM
Oh, I don't have that many so I won't be able to make it yet but once I get enough I might make it. I'll use a different gun for the cardboard target and use this one to shoot down things.
evilpooh in reply to Danielzxzx1Jul 2, 2011. 10:37 PM
If you use a small piece of plain scotch tape and wrap it around where the grey and orange connectors connect they won't explode (use just enough tape to wrap around once or it will interfere with loading and firing, and be sure its wrapped very tight).
Shooting those, I've got it to go through cardboard at about 10ft (took 2 shots, the first one weakens the spot and second one went through go through the cardboard.
Inventor X says: Jun 27, 2011. 5:24 PM
Im in love with the mechanics this weapon utilizes. :D
Now if we can apply this concept into a smaller gun.. it would wreak havock..
Kinetic (author) in reply to Inventor XJun 28, 2011. 5:45 PM
Yeah if someone used this mech to shoot grey connectors that would be great.
Danielzxzx1 says: Jun 28, 2011. 1:23 PM
How accurate is this gun? I might use it for a target. Can someone tell me how accurate the gun is?
Kinetic (author) in reply to Danielzxzx1Jun 28, 2011. 5:44 PM
It is a really fun gun to shoot cans with as it is dead accurate at about 20 feet but after that the bullet (perhaps one of the worst bullets out there) tends to spin out. If it could be somehow modded to shoot grey cons is would be much more accurate a much greater distance.
1-40 of 132Next »
Pro

Get More Out of Instructables

Already have an Account?

close

PDF Downloads
As a Pro member, you will gain access to download any Instructable in the PDF format. You also have the ability to customize your PDF download.

Upgrade to Pro today!