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another full auto machine gun mechanism Answered

Right this is just the mech of the machine gun you will have to make the mag/clip/barrel/everything.
You may have seen this already on the comment on https://www.instructables.com/id/8-SHOT-KNEX-HAND-GUN-REVOLVER/?&sort=NEWEST&limit=50&offset=50

The comment with it was posted May 7, 2008. 12:25 PM.
Basicaly the hammer is attached to a small cog, a motor or handle is attached to a cog with only 4 teeth(on each half) the 4 teeth will crank the hammer back then when it runs out of teeth it will snap back, it actually works(I would have posted but my sister destroyed it D= ) te only problem I had was the mag, I attempted to build a box mag, oh and the fact you need a metal rod for the handle/motor and for the hammer with gear on(I lost 3 red rods because it just twisted the hell out of them, it was impossible to use them again)

So you can only make it with some sort of renforced rod, but overall it actually works.

this is just a small step by step type thing
Step 1

sand down 3/4 of a small cog.

Step 2

to speed up rate of fire add speed up gears (optional)

Step 3

make hammer, lock canibalised cog onto a rod with hammer

Step 4

connect it to speed up gear/s

Step 5

add elastic band to hammer

Step 6

add mag, clip or belt. note: if you make belt the add timmed gears to the speed up gear.

34 Replies

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finmonster (author)2010-01-04

i made  fully auto hand cranked one but there was so much frriction in the barrel the bullet would not come out

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Miles Tails Prower (author)2009-06-06

You don't need to cut up the cog, there is a gear that already is like that.

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Adrian.16 (author)2008-10-22

Seen i vid of a knex gun working EXACTLEY like this ill try and find the vid...

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Adrian.16 (author)Adrian.162008-10-22

Click meh
Note the teeth missing on the red gear
Basicly the same just pulls back the pin a better way ;)

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TigerNod (author)Adrian.162009-01-04

Wow, that thing is awesome!

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CrazyCHRIS!! (author)TigerNod2009-01-18

what youve built this?, or the pistol?

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TigerNod (author)CrazyCHRIS!!2009-01-19

I have not built the thing on Youtube yet, I have lost my cannibalised gears (yes, some of them come cannibalised from the factory, no, you don't have to cut your yellow gears of). I cannot even understand how your thing works, for it is so complicated. Perhaps you should post a pic from this, or a Mclad image.

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CrazyCHRIS!! (author)TigerNod2009-01-25

i havent got a camera of my own, my sister has but she wouldnt let me use it

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TigerNod (author)CrazyCHRIS!!2009-01-25

Aw, that's sad. Perhaps you can borrow it from a friend or something? (just thinking)

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TigerNod (author)Adrian.162009-01-04

Would be even better with cut one-hole connectors! I'm gonna build it right now!

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CrazyCHRIS!! (author)Adrian.162008-10-25

Oh I did'nt actually see this when I thoughtof it, but mine uses a hammer so there little different.

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TigerNod (author)2008-12-30

This sounds horribly complex. Are you sure this is going to work? If it works, it would be awesome!

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CrazyCHRIS!! (author)TigerNod2009-01-02

oh it does work it's just the belt feed does'nt work

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TigerNod (author)CrazyCHRIS!!2009-01-04

Ah, now I understand. But why don't you post pics of it and instructions? PS: Your avatar image is pwnage :-P

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crestind (author)2008-11-13

The challenge of K'nex is making things work without cutting up pieces.

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TigerNod (author)crestind2008-12-30

Making a good bolt-action gun with a clip is impossible without that cut one-hole connector. (I think.)

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CrazyCHRIS!! (author)crestind2008-11-18

i think in this case it would be imposible

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crestind (author)CrazyCHRIS!!2008-11-18

Of course not. It just needs a mechanism to pull the gears out of the way every interval. If you can imagine it, you can build it! ;)

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CrazyCHRIS!! (author)crestind2008-11-19

thats the problem, I suppose i just have no imagination! *cry*

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CrazyCHRIS!! (author)2008-11-19

by the way dont even bother with the engine thing, it dont work

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CrazyCHRIS!! (author)2008-11-13

if you want to see my new forum topic its about an engine i might use to power the gun

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CrazyCHRIS!! (author)2008-11-05

Status report I have finished the full auto mech, however I cannot make the belt with the bullets on it go in the place they should go when the hammer supposed to hit them, other than that everything is going to plan.

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CrazyCHRIS!! (author)2008-10-30

wheather it is my idea or not I have started to re-build the mech and put it in a vickers machine gun(hopefully), not a M2.

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Der Bradly (author)2008-10-22

This is the Bakenbitz idea!

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Katarukito (author)2008-10-22

this is how a airsoft gear box works??

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CrazyCHRIS!! (author)Katarukito2008-10-25

no i think thats like a rack and pinion mech

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Katarukito (author)CrazyCHRIS!!2008-10-25

pretty similar if you ask me

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TheDunkis (author)2008-10-22

Hmm not a bad idea using a hammer. I still don't think it will get as much power but I don't know we'd have to compare the rack and pinion with this and see which works better.

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CrazyCHRIS!! (author)TheDunkis2008-10-25

if you have a handle then you can just pile on the rubber bands, look at this, this will show you how powerful the hammer can be.

https://www.instructables.com/id/Knex-Pistol-with-a-NEW-firing-mechanism-a-Hamme/

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user

No!! You cut the beautiful cog.

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