Introduction: Semi Automatic Knex Gun


This is a semi automatic gun that uses cartridges which can be loaded from the top. After one cartridge is fired it falls out the bottom and the next one falls into the chamber. The gun is gravity fed so it can only fire as fast as the cartridges can fall, but it will shoot almost as fast as you can pull the trigger . This gun shoots hard so if you build it be careful.

Step 1: The Chamber


The chamber is essintially a set of rails which the cartridges will slide down and a firing bar which will hold them until they are fired.

Step 2: Trigger


The trigger, when pulled, will break the orange part off the cartridge and release the bullet.

Step 3: Trigger Handle


The construction of the handle.

Step 4: Deflector

The deflector will keep the orange piece from shooting to the ceiling after it breaks off.

Step 5: Barrel

The barrel is for looks and so you can hold the gun, it has no effect on the bullet what so ever.

Step 6: Handle

Just a hand hold.

Step 7: Magazine


After this is installed the gun will be able to hold five shots.

Step 8: Cartridge


You will need to have these orange pieces which come from the old roller coaster set. If you don't have them you will need to just add the little blue spacers to keep the white end from sliding. The gun will be able to hold five of the cartridges. Once you have built a cartridge you may want to slide it through the gun before you load it to make sure it falls freely. It should fall all the way through the gun without you pushing on it.

Step 9: Loading and Firing


You load the cartridges like in the picture. Hook the bullet through the rubber band, pull it back through the hole in the white end and attach the orange piece to it. Once you have it loaded, drop it into the rails at the top and let it slide down to the firing bar. When you pull the trigger, the orange piece will break off, releasing the bullet and letting the empty cartridge fall out of the bottom of the gun.

Comments

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wezils tuts made it! (author)2014-04-09

how far is range

author
DJ Radio made it! (author)2009-11-13

*pseudo* semi auto.  Looks nice, 4*

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An Villain made it! (author)An Villain2010-03-23

no, semi auto, all you have to do is load new cartridges, not re-cock old ones.

author
noobererer made it! (author)2010-01-26

I like your idea. Though, I tried to make a sniper where the orange connecter held the bullet back sort of like yours and the rod slipped right out of the connector after a certain tension. Good idea though.

author
flossynewt7 made it! (author)flossynewt72010-01-27

You must have had a hell of alot of tension on it, what were you trying to kill?

author
noobererer made it! (author)noobererer2010-01-28

Lol It actually slipped out earlier than expected but yeah it still had a lot of tension on it. Would have shot really well though :P.

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agent harmsy made it! (author)2009-11-16

I agree with Oblivitus, it could use a LOT of refining, but new mechs always do :P
    4*

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Oblivitus made it! (author)2009-11-14

Nice design, I hope that others will continue to improve this.

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Mr. Muggle made it! (author)2009-11-14

now this is a real semi auto, 4*

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Whaleman made it! (author)2009-11-13
I have seen this done better on youtube. You could probably try to build up the frame to make it a bit sturdier and a little less clunky. You also might want to make the cartridges a bit more compact in order to increase magazine capacity.
 
author
flossynewt7 made it! (author)flossynewt72009-11-13

Can you tell me the link of the video you are talking about?

author
Whaleman made it! (author)Whaleman2009-11-13
I could have, two or three years ago when I found it. Now it'd be nearly impossible, what with not knowing the name or having the time to sift through the thousands of knex videos. I'll give a link if I happen to find it.
 
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RMConstruction made it! (author)2009-11-13

interesting, but looks overly chunky.

author
~KGB~ made it! (author)2009-11-13

cool

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