Introduction: Semi-automatic 7 Shot Knex Rifle

Picture of Semi-automatic 7 Shot Knex Rifle

A semi-automatic knex rifle with 7shot bottom loading magazine that has a very powerful shot, but a long loading time.

Step 1: Make the Barrel

Picture of Make the Barrel

Pretty simple. Look at the picture.

Step 2: Make the Stock

Picture of Make the Stock

Also simple. Look at pictures

Step 3: Make the Trigger and Firing Device

Picture of Make the Trigger and Firing Device

Step 4: Make the Magazine

Picture of Make the Magazine

1)Make this
2)Make this
3)Add this to step 1
4)Then add this to steps 1+3
5)Like this
6-8)Add step 2 to steps 1,3,4 so that the yellow is pointing away from step 4.
9)Add blue supports
10)Then add the bullet support system

Step 5: Make the Connector

Picture of Make the Connector

Simple. Just make this.(the red is held by a green attached to it.)

Step 6: Connect

Picture of Connect

Connect 4 to 5 1 to 4 5 to 3 3 to 2
To get this

Step 7: Loading

Picture of Loading

1)Take these greens off
2)Take of these 3 rods
3)Got 7 heavy rubber bands and 2 weaker ones?
4)Take one of those heavy rubber bands and stretch it from the wheel to the front of the gun then rotate the wheel backwards until it clicks
4a)Repeat 6 more times then make sure the rubber bands are inside between the white connectors
5)Add the blue rods back
6)load the bullets so the orange is toward the back on the gun load between 2-3 bullets per time until you get 7 into the magazine.
7)Add the mag (spring) and yellow rods back
8-9)Add those 2 weaker rubber bands to the spring
10)It should look like this, but with 6 more rubber bands
11)Your ready to fire, have fun but don't shoot your eye out

Step 8: Credits

Thanks Beddbug2 for the first rbg that shoot bullets


buttons03 (author)2009-12-31

bad. trigger mech dosent even work.

The Jamalam (author)buttons032010-12-24

Yep, it does.

Ukiarue (author)buttons032010-07-05

i built this a while back, loaded... 8 shots lol, and shot it, fired full auto cause the trigger couldnt catch the ratchet thing. its a decent gun being a semi auto slingshot rifle...

lollolman148 (author)2010-10-31

ouch my eye i need a plaster

14r31337 (author)2010-08-27

I see all those comments on it doesn't shoot, and I'm wondering whether it does or not.

14r31337 (author)14r313372010-09-07

It works, I can vouch for it.

lioneatr (author)2009-05-02

is this 3 thick???

poptart432 (author)lioneatr2009-06-03


no its 12 soz tok me a second to see it 2 ur right its 3

_kira_ (author)2009-08-11

holy fudge i just loaded the rubberbands and pressed triger then the thing xploded in my eye!

knexaddicted (author)_kira_2009-08-17

lol that med me laugh as i was scanning thru comments and i red urs and u med me laugh sos for laughin at ur pain.... r u ok?

~Aeronous~ (author)knexaddicted2010-04-14


mashedpotato13 (author)_kira_2010-04-04

Same, but I had glasses. NOt in the hospital, are you?;)

Raikou-san (author)2009-12-15

Seeing all the comments about how it explodes makes me want to make it just to see it explode. :D

cerj (author)Raikou-san2010-02-11

 it's kinda like being poked in the eye with a sharp stick.

it's kinda funny but hurts like hell.

cerj (author)2009-06-30

ouch -.- the snowflake that holds the bands just exploded. it's a self destructing k'nex gun!

An Villain (author)cerj2009-07-11

i know the feeling, i once fired the entire snowflake with the white rods on, RAZOR RIFLE!!!!!!!!!!!!!!!!

cerj (author)An Villain2009-07-13


An Villain (author)cerj2009-07-13

i know, same thing happened with bunduk's semi auto RBG pistol, except i launched the Mechanism, barrel, trigger, and supports. all i had left was the handle.

psharpep (author)An Villain2009-11-25

Haha it's the bullet that shoots guns!

NYPA (author)An Villain2009-11-22

I bet you were like WTF?

An Villain (author)NYPA2009-11-23

yes, it was cool though because it exploded and shot stuff everywhere, and then i died. 

cerj (author)An Villain2009-07-14

LOL It's a handle that shoots guns!

thomaswatton (author)cerj2009-10-31


Skaptor (author)cerj2009-08-06

or a gun that shoots handles

An Villain (author)cerj2009-07-14

yep, the modified grenade launcher, uses shells.

Merugop (author)2009-08-05

Please better picture please

lioneatr (author)Merugop2009-09-22

yeah cmon cerialy

cooldoodjak (author)2009-09-18

its a good try but i shot it and it exploded and badly broke 2 of my fingers hahahaha =D

Cam R (author)2009-08-08

It looks like a really cool gun, but I can not work out how to make the trigger! Could you post some more instructions for it?

mgbgt (author)2009-07-20

If you lower the stock and move it out a bit it is much easier to aim.

Dirtyboyy (author)2009-07-08

no ! , i have made this gun for test and the weel to hold the rubberbands breaks off ! :S wtf he can max shoot 50 feet ! :S allricht he is funny :D , bud try to make a better gun than that ( more stronger )

Acepilot42 (author)2009-06-26

are u 4 cerial? this was soooooooooooooooooooooo easy to build

noob builder (author)2009-06-18

DARNIT! i destroyed the gun just when i got the right RB's omg! lets builda again!

UZI dude (author)2009-06-15

cool gun

noob builder (author)2008-10-31


Superpoopa (author)noob builder2009-06-13


zapple (author)2009-05-26

veary unclear. how do you shoot it? let off the trigger?!? i need help!!!!!!!

Ikedog1995 (author)zapple2009-06-09

well this is very late and you've probably already destroyed the gun but its semi automatic. you probably loaded it wrong if it doesn't work.

K-Dawg (author)2009-05-07

bad pic

K-Dawg (author)2009-05-07

need better pic!

The Jamalam (author)2009-04-05


Who posted it first?


Bwbt1 (author)2009-03-30


An Villain (author)2009-03-28

your black clips are red i notice

Knexagon (author)2008-03-27

To everyone: I am the laziest person ever I know, but I've been working other stuff now and have been to busy to care about knex. I am sorry for this and I may get back on some other time. My knex trebuchet is probably that last thing ill post for a while.

The Jamalam (author)Knexagon2009-03-21


ILIKEPIE333 (author)2009-02-03

I made a different barrel for this to make it a pistol
just three yellow connectors on a blue and put it on the top blue rod where the original barrel was
it is the same using it just as a rubber band gun
I have not tested it with the bullets yet
so dont think I knew that the bullets had crappy range or not because I do not
I used average thick rubber bands, #64 I think

ILIKEPIE333 (author)ILIKEPIE3332009-02-03

it does not work with the bullets

About This Instructable




Bio: Some kid that likes creating things or viewing them to see the science behind them.
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