Introduction: The Knex Thompson Sub Machine Gun (SMG)

Picture of The Knex Thompson Sub Machine Gun (SMG)

This gun is fairly powerful, 30-50 feet with two rubber bands, can hold 4-6 rubber bands, it has a true trigger and is accurate for 20-30 feet. Please post comments and enjoy!

Step 1: Magazine

Picture of Magazine

Make the magazine

oh and the missing black fist connectors at the bottom are supposed to be there, i just ran out of them!

Step 2: The Trigger

Picture of The Trigger

Nice, easy true trigger.

Step 3: The Handle

Picture of The Handle

1. Make

it looks unstable but it will be supported by the barrel and the stock. it is very stable.

Step 4: The Barrel Extension (with Forward Sight)

Picture of The Barrel Extension (with Forward Sight)

All fairly simple, no need to take apart, to make instructions.

this is the barrel extension and forward sight

Step 5: The Barrel

Picture of The Barrel

The Barrel is easy to make and has barely any friction for maximum power, again no need to take apart to make instructions.

Step 6: The Stock

Picture of The Stock

Picture 1:Make.
Picture 3.Join them together.

Step 7: Putting It Together.

Picture of Putting It Together.

1. Add the handle as seen, the black connector goes inbetween the first tan lock and purple connector, then the purple connector to the right goes right inbetween the gap of the handle for extra stabillity.
2. Fairly simple to attach, but the top green part that blocks, i would change it with a Y connector to make shooting a bit better. just if you dont pull the trigger fast enough with the green rod on it will be harder to fire.
3. Add The Magazine, really easy to be honest.
4. Add the extra barrel, easy again
5. Add the stock.
6.Look at the bottom of the handle, there is a grey connector attached near the red, sorry for not telling you but you need one to be there and on the other side.
7.This is the magazine pusher.
8.This is what it should look like
9.It should look like this also.

Step 8: Loading and Firing (attaching the Rubber Bands)

Picture of Loading and Firing (attaching the Rubber Bands)

Only one more thing to go..... oh and the firing pin, i forgot, is simply a grey rod with an orange connector at the end with duct tape strengthening it.
1.You'll need this, ignore the grey connectors, i already told you about them!
2.Attach like so on both sides.
3.Draw back to here and hold, (also add the rubber bands to the trigger as shown.
4.The Finished result.
5. Load the mag with white rods, about 10 and put the mag pusher in with a rubber band

Thanks! Please comment and rate. any mods are welcome as long as i get some credit. happy shooting.

Ps. this is my first instructable, sorry if its not the best in the world, like mepains guns....


JackF3 (author)2014-09-09

I made it it was pretty bad. No offense but totally not how you described it to be

JackF3 (author)2014-09-09

what is the ammo?

knex inventor (author)2010-09-20

nice gun but all you need to do is tweek the stock so its better then send some more pics =)


TheUnfortunateHobbit (author)2014-01-01

finally a use for my multitude of yellow flexi-rods!

sandmman (author)2012-05-19

Firstly, you should try filling it out a little (especially on the stock)
Secondly, I haven't built it but it doesn't look too sturdy
You should also make it a bit larger.

But overall not a bad gun for a replica, looks quite like a Thompson, work on it and it could be alto better. :)

PotatoCoffee (author)2011-12-04

Pretty good.

james4 (author)2009-10-25

NONE OF THESE DAMN THOMPSON'S WORK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mac1997 (author)james42011-05-27

yes they do you have just built it wrong

james4 (author)Mac19972011-05-29

i built it RIGHT

james4 (author)Mac19972011-05-28

well 1. i built it before i built it right it was not working 2.that was 2 yrs ago and 3i was pissed because i wanted to make a Thompson

knexriflekid (author)james42011-04-02

1's at the end instead of !'s LOL!

Flatout Knex (author)james42011-01-29

mine does

where is it then? If it can shoot 70 ft and go through 2 layers of cardboard; post it.

its dead

thats cool, im working on a rifle.


its an ak 47

tthomasvd (author)2011-03-01

youl need to do some work on the stock..siriously

Flatout Knex (author)2011-02-04


Its on now!!!

i just looked at it

spricer988 (author)2010-04-27

 nice gun but u should make the stalk smaller

no offence put i just made it and it is great it needs longer barrel

u stlole my pie908 (author)2009-10-18

why do people call it the true trigger instead of just the trigger

cause it sounds better

Jbear28 (author)2009-12-02

will you please add more pics i can hardly see what you are offence

tthomasvd (author)2009-11-28

dude its a pretty nice gun but the stock is bad and the barrel isnt right but its cool.

Boasz (author)2009-11-26

what's in the middle of the 2 yellow connetors?

T-Dog13 (author)2009-11-12

do u have to have the bendy rods??

deadaccount (author)2009-10-24

mor pics plz needs mor hard to bild mor pics plz

stopanator (author)2009-08-26

yellow flexi rods?

manu11 (author)2008-05-28

cool, looks awesome, has a mag ,true trigger, Good work

thomaswatton (author)manu112009-01-07

im guessing u support manchester united if u do ur cool

J4mm3r5 (author)thomaswatton2009-02-01

woo-hoo united rule

thomaswatton (author)J4mm3r52009-02-01

who's your fave player

J4mm3r5 (author)thomaswatton2009-02-07

dunno. Hard to say. Ronaldo? maybe...

thomaswatton (author)J4mm3r52009-08-15

I DON'T LYK RONALDO ANYMORE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! lolz

J4mm3r5 (author)thomaswatton2009-08-18

Guess what I haven't liked him 4 ages!

thomaswatton (author)J4mm3r52009-02-08

I know, their all so good, but i would probably say Ronnaldo aswell. He's just been voted world player of the year hasn't he (aswell as like a million other personal awards.

J4mm3r5 (author)thomaswatton2009-02-09

My cousins boyfriend thinks all man u layers are scum. If you even mention him he'll say yeah he's a filthy scu (he supports Blackburn)

PALEY i dont think i spelled that rite

Nope i don't think u did lol.

u gut the message he PWNS


you suck aswell your just as bad as my brother supporting scum

O.K. Thats friendly.....................

you suck

no u do

TheEliminatorX (author)manu112008-05-28

thank you very much. did you build it? do you have any tips for me? also the h&k; mp5 with a curved mag is coming next.

About This Instructable




Bio: i am a knex gun builder
More by TheEliminatorX:The Knex mp5 with a realistic magazineThe Knex Thompson Sub Machine Gun (SMG)
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