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Full Autos (K'NEX) Answered

With this link, it should be easy to build a K'NEX automatic. Scroll down to "Blowback Guns" and hold down the trigger.

Discussions

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Miles Tails Prower

9 years ago

It isn't possible to make a blowback gun with K'NEX. Because we do not use explosives in guns, so we don't get the recoil. However, it is possible to make a machine gun out of k'nex with THIS DESIGN IN THE VIDEO. It's a basic setup: At first. A large wheel with pins sticking out rotates and pulls back the firing pin. After a while the firing pin will be released, letting the firing pin blow the bullet out of the barrel. If you continue cranking, this proccess will repeat, and there's your fully automatic gun. However, some k'nex guns are powered by firecrackers. But if you would use real bullets the barrel would explode from the extreme force. (Sorry for ultimately long comment :P)

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knexguyMiles Tails Prower

Reply 9 years ago

Yeah, because this hasn't been answered or anything... Bit of an old topic, annoying when they keep getting necroposted.

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DrWeird117knexguy

Reply 9 years ago

I don't understand why it's annoying.

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knexguyDrWeird117

Reply 9 years ago

Because they are old topics no-one cares about anymore.

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DrWeird117knexguy

Reply 9 years ago

Still, it's not yours. I care if someone posts a reply.

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chopstx

9 years ago

its the never ending revolver!!!!

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Wafflicious

9 years ago

There is nothing for knex guns to get the explosion necessary to push the pin back.

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WaffliciousDrWeird117

Reply 9 years ago

Mabey put a rubber band after the pin hits the bullet so it doesn't loose speed but then gets pushed back???

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knexguyWafflicious

Reply 9 years ago

Doesn't work. Try applying some physics. Newtons 3rd (I think) Law: Every action has an equal and opposite reaction. So if the bands on the pin were stronger, the bands to push it back wouldn't be able to outbalance the pin bands, if the push-back bands were stronger the gun wouldn't fire, and if they were balances the pin wouldn't move at all.

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Millawi Legendknexguy

Reply 9 years ago

if his law is true, then it should work. a full auto knex gun. if we completely held the gun solid in place then the firing pin should bounce back according to his law.

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knexsniper1Millawi Legend

Reply 9 years ago

no it wouldn't because the ram would apply say 5 newtons of force, and the rubberband would apply 5 newtons back onto it, but since the ram has more mass, it will force the rubberband back instead, not the other way around.

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Waffliciousknexguy

Reply 9 years ago

If the front ones were more powerful and in front of were the pin hits the ammo so It only feels the tension after it fires it might work.

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knexguyWafflicious

Reply 9 years ago

Build it so it works then speak to me whilst holding it. Trust me, it won't.

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happybirthdayDrWeird117

Reply 9 years ago

you read my other comment? NOTE:I was under the efects of 10 energy drinks when I wrote it.

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happybirthdayDrWeird117

Reply 9 years ago

what if you put a spring on each bullet? like, you could use my AR4 and instead of using shells use springs? it will take ALOT' of modding though

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knexsniper1

9 years ago

there are several ways to make a full auto gun. 1. use a motor to pull and release the ram 2. use a crank to pull and release 3. something I thought of that may work: hold a whole bunch of rubber bands ona spinning white connector, and have a mag that pushes the bullets up fast enough to recieve contact with each rubberband. it could work. REMEMBER!!!!! NUMBER 3 WAS MY IDEA. JUST THOUGHT I'D SAY THAT.

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knexsniper1TwistedParadox

Reply 9 years ago

yeah, you're right, i searched some more and saw that it was already used, sorry to anyone who may have been offended by this comment.

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knexguyknexsniper1

Reply 9 years ago

Number 3 does work, but as more of a shotgun than a machine gun.

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DrWeird117knexsniper1

Reply 9 years ago

What do you mean by "hold" them? Other than the fact I don't know what you mean, I get it. (?)

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knexsniper1DrWeird117

Reply 9 years ago

ok, you know how you have that little area in any connector that connects to a rod? will in that place, you can put a rubber band and when it rotates, it will release the rubberband.

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shadowninja31

9 years ago

yeah, wouldn't work, but the gatling gun might.

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Dutchj

9 years ago

I've had a lot of inspiration from howstuffworks, but the blowback or gas systems simply don't work in a K'nex gun.

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Der Bradly

9 years ago

Would not work, you would need an explosion in the barrel (Which cannot be performed in knex guns) To push the bullet forward and the pin back

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DJ Radio

9 years ago

Bakenbitz's mech is the closest we can get to that.

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Millawi Legend

9 years ago

i think the gatling gun is the easyist to complete.

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knexguy

9 years ago

What would push the bolt back after each shot? Short of fitting explosives, nothing.