Introduction: Killerk's Magnum

Picture of Killerk's Magnum

Killerk has posted pictures about his magnum but never posted the instructable so here it is.

Step 1: Create the Handle

Picture of Create the Handle

1. Connect ten green connectors to a red rod and add the parts shown
2. Add 5 green connectors and attach a yellow connector to the top of the red rod
3. Connect two yellow connectors to the bottom of a red rod and push the rod up through the first ten green connectors, add the parts shown and push rod all the way up. Add a yellow connector to the top. Put a grey connector on a white rod and connect white rod to yellow connectors.

Step 2: Lower Barrel

Picture of Lower Barrel

1. Add brown connector to green rod on right of barrel at the top.
2. Slide white rod into hole of brown connector and connect two yellow connector's to the rod.
3. Swivel yellow connector's round to look like so and push two green rods in either side.
4. Connect a green rod to a brown connector and slide a white rod through the hole, connect two yellow connectors to it.
5. Attach to the rest of the gun with two green rods.
6. Snap the top off of a green connector and slide a white rod through it's hole. Attach like in image.
7. Create four more parts like in image 4, except the brown connector closest to swivelling brown connector should have no green rod on the right side. Attach two white rods between yellow and red connectors on each side.

Step 3: Upper Barrel

Picture of Upper Barrel

1. Create 7 of the same piece consisting of two yellow connector's, one brown connector, a white rod and a green rod. At the front of the gun attach a white rod to the brown connector.
2. Attach one of these to the white rod at the front of the gun.

Step 4: Connecting Upper and Lower Barrel

Picture of Connecting Upper and Lower Barrel

1. Make the part on the left once by connecting two yellow connector's with a green rod and connecting a white rod. Create the part on the right 5 times the same as the other part but without the white rod.
2. This is the firing pin, create it by connecting two red connector's with a green rod and attaching a yellow rod.
3. Slide the firing pin between the two halves of the barrel and at the back of the gun place the part that was on the left of image 1 over the two protruding white rods, place one of the other parts on the other side. Connect two parts together and attach so that one side of it is over two protruding white rods at the front and repeat for the other side.
4. Attach two blue rods at the back of the gun to the parts added in image 3. Attach one blue rod at the front as in the image.
5. Finish the front by adding two green rods and a brown connector

Step 5: Adding Rubber Bands

Picture of Adding Rubber Bands

The Notes on the images show where they go.

Step 6: Firing

Picture of Firing

To cock the gun pull the firing pin back with the yellow rod attached to it.

The safety is the white rod sticking out at the back (highlighted in picture). To turn the safety on when the pin is bulled back push the white rod through ther hole at the top of the red conector on the firing pin.

To load put a bullet (image 2) in the orange connector at the front.

Just pull the trigger to fire.


Fred the evil puppet (author)2011-06-05

where is his pics? i looked on all his ibles and forums but none had them

MajorRockstar7 (author)2009-10-14

 who or what is killer k


ILIKEPIE333 (author)2009-09-24

you dont need these instructions, and the worst thing is that this isnt the only one! You can just build it from the pictures

michiel123456789 (author)2009-08-22

search instructables mlcad then click the first

OlWhatshisface (author)2009-08-17

An easy way to create the trigger piece is to use a pair of nail clippers to clip the top of the green connector off.

deawon2 (author)2009-07-28

what program is used for that?

Ecr72 (author)2009-07-25

What is the range on this gun?

Bartboy (author)2009-06-06


pimmy65 (author)2009-03-08

it look cool ! do you know how far it shoots? (i have rate 4 stars)

m1n1j1mmy (author)2009-02-20

i thought magnum was an ice cream?? :P

Knex_Gun_Builder (author)2009-01-19

no thats a revolver. a magnum is a gun with a longer shell then normal so it gets more power.

twinfred2 (author)2008-07-11

What software did you use?

ur a noob! gawd he obvuoisly used mlcad!

maid63 (author)Ltcheesecracker2009-01-16

doesn't that only make legos?

Ltcheesecracker (author)maid632009-01-16

no it does some knex too, but yes mosly legos.

random joe (author)2007-12-01

ah dude thats a revolver

maid63 (author)random joe2009-01-16

don't defy the gun... ...just love it

KnexKill (author)2008-01-06

the blue piece doesn't let the yellow connector attach why?

I_am_Canadian (author)KnexKill2008-02-12

umm where?

maid63 (author)I_am_Canadian2009-01-16


themoonatic (author)2008-08-24

i made it and it only shot about 10ft

alfpwns (author)2008-08-05

i shattered 1 of the red conectors on the pin and the pin came a part after i fired!!!!!!!!!!!!!!!! how do i fix it?

I_am_Canadian (author)alfpwns2008-08-19

Make sure you attach the rubberbands to the back of the pin, not on the rod.

juneapaluna (author)2008-02-05

lol, yea.

combot55 (author)juneapaluna2008-04-04

me 2. i got hit with the ram rod stick. 4 #64 rubberbands!

mettaurlover (author)combot552008-06-08

the ram is a real problem. mine self-destructs every time i fire it, but it DID almost punch a hole in my wall...

zap89 (author)2008-04-05

yeah thats what i thought

combot55 (author)2008-04-04


zap89 (author)2008-03-01

lol i havent got this piece...

combot55 (author)zap892008-04-04

me neather lolz

combot55 (author)combot552008-04-04

o me thinks its a sight, so you dont nead it.

sniperliverlover (author)2007-08-19

how did you break the top bit off?

cut with needle nosed pliers dont bend, squeeze


easiest way is to pull it back with a pair of needle nose pliers (if it just bends, put it in the freezer for half an hour and then try), or you could just cut/saw it off.

ultimate_sniper (author)2008-02-19

this guns f&*%$(" awesome if your looking for a powerful gun this IS FOR YOUUU i shot mine 40 feet with only 4 rubber bands adding more soon later :-P the accuraccy is standard and the build quality is astounding A DEFINATE PRAISE FROM ME

zap89 (author)ultimate_sniper2008-03-01

this is rubbish... when i pull the firing pin back, i have to push the trigger then when i want to shoot. i let go. i dont thing i did it right but i copied all the instructions completely and rightly...

ultimate_sniper (author)zap892008-03-01

the only thing i can recommend is doing it again but this time pay ultra care and observe carefully, i know how you feel but if you want to get it to work just follow it with more precision and carefulness.

zap89 (author)ultimate_sniper2008-03-02

thanks i just realsied, i fgot to put th second elastic band on and it reversed the thing. so when i let go it shoots... thanks

ultimate_sniper (author)zap892008-03-02

its ok glad i could help

zap89 (author)2008-03-01

not very good instructions here

Post Script (author)2008-01-27

awesome gun! i made this and with one rubber band it went 20ft!

juneapaluna (author)2008-01-22

AWESOME!!!!!!!!! except it misfired and I shot my finger and it is bruised and hurts really bad!!!!!

KnexKill (author)2008-01-06

Hey, Uhhh why do u have to break the peice can't u just use a red connnector or sumthing?

RazerM (author)KnexKill2008-01-07

It has to have a green with 7 of the normal 8 bits that stick out.

jackington (author)2007-12-15

does anyone know how to work the trigger

Mr Tenacious (author)2007-07-15

this ain't great, i mean it's pretty technical an all but i found it didn't have great power for me. i don't think it stands up to what killerk made it out to be.

wadup95 (author)Mr Tenacious2007-10-24

put more bands on. mine snapped the grey part of the bullet from about 10 ft into a wall

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