Spring Powered Knex Gun




Introduction: Spring Powered Knex Gun

About: I like building computers, buying useless junk for allmost notghing from Ebay, Listening to music (Iron Maiden :D)

Okey, this is a very simple gun, wich is made just for showing people how-to-use-a-spring-in-a-standard-block-trigger-gun.

shoots a fine 40 feet (with my spring)

If your just going to post something similar to stop posting this becuase its a block trigger, don't, i will come to you and haunt you (A).
This gun also can use some standard rubber bands, but i dont suggest it.


Step 1: Gather Your Parts!

get yourself:
1 spring, about 1 cm diameter and about 7 cm long.

1 rubber band, fo rthe auto cocking, as small as possible (even those tiny little half a centimetre ones will do!)

1 ball joint connector

2 blue rods
5 yellow rods
4 white rods
3 green/black rods
2 red/tan rods
2 grey/black rods

12 yellow connectors
4 white connectors
11 green connectors
2 red connectors
6 light gray connectors
24 dark gray connectors

Step 2: Make the Handle

i know its crap, i just used it because its simple, sturdy, squizeable and connectable to this gun!
the pics should be easy enough, if not, you really need to ges some glasses (or put them on).

Step 3: Create the Ram Rod

the pic should be lear enoug, just two yellow rods with a white one in between, spring slided over one side of the ram, and finally two white rods for cocking.

Step 4: Make the Body

just follow the pictures, i think they are clear anough.

Step 5: Two Little Pieces

this is just a blue rod with a grey (1 slot) connector clipped on it, and put it in the clone machine.

Step 6: Mounting in the Ram Rod

this may sound very easy, but maybe can be a little harder than you might think, the pictures will clear it up :)

Step 7: Connect the Handle.

just connect the two yellow rods to the two rd rods, on the back o fthe gun, dont forget to put the pieces od two steps before on it before adding the handle :).

Step 8: Rubbering, Loading, Aiming and Firing!

add one rubber band to the trigger, and then wrap it around the front handle.

to load, put you left thumb on the red connector on the back of the gun, then take the two white pieces on the ram with oint and middle finger, pull back untill you hear the lovely "click" stick a rod in the front and then hold the handles, put your left thumb on the trigger, put your face near the back of the gun, aim and shoot!



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    42 Discussions

    you might want to add what kind of spring (extension or compression, extensions springs are kinda like a rubber-band and compression springs are the kind that you're using

    1 reply

    You can use both, if you use a compression spring you should just attach it on the other side of the ram and also attach it on the front somehow.

    I know that I tend to be a smart alec at times but this isn't so much an Instructable as it is, a picture book. Being that I've seen many guns posted on this site over the years, your particular design caught my interest because it was intelligently crafted on a spring-based weaponry layout. This stood out quite well in comparison to the weak, noobish, and unreliable sea of useless rubber band driven hand guns. However this Instructable became a disappointment upon seeing that it had no instructions, thus reducing it to a mere suffix that is -able. While some are capable of creation from illustration, others, including myself, simply wait until this -able's author to bring enlightenment concerning the methods used to create such a weapon of ingenuity.

    3 replies

    sweet name!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    I got a spring gun that's as powerfulas the KK gun - making a magaazine for it. should i post it. P.S. If this goes 50ft. is about the same power.

    it was a little to powerful but i once used an old broken airsoft guns spring (expect to used bracers/conforters on not just the fireing pin but where the pin hits the conectors.