Introduction: Scorpion 360 C.D.M (Critical Demelition Mass)

Picture of Scorpion 360 C.D.M (Critical Demelition Mass)

Check my TKBT (The Knex Bear Trap) too!
This is one of my sweetest looking guns.
It has a range of 25 to 60 ft depending on the quality and the number of rubberbands

-Cool ass design
-True trigger
-Can take a punch
-Very powerful
-Pretty low part use

-Magazine doesn't work at all
-Painful when you get hit (if you hit someone else, it's a pro)

Step 1: Firing Pin

Picture of Firing Pin

build this

Step 2: Fake Magazine Sides

Picture of Fake Magazine Sides

Build this 2 times

Step 3: Fake Magazine Bottom

Picture of Fake Magazine Bottom

build this

Step 4: Handle for Walking

Picture of Handle for Walking

This part enables you to carry it without the trigger sitting in the way

Step 5: Barrel

Picture of Barrel

This is the most time-consuming and painful part to build

Step 6: Side Panels

Picture of Side Panels

this part is very important 'cause without it, it would'nt even work half as good as it would with these two on it

build it two times

Step 7: Handle

Picture of Handle

This part is for putting on the trigger and for comfort

Step 8: Trigger

Picture of Trigger

For holding the firing pin from shooting to early

Step 9: Putting It Together

Picture of Putting It Together

Pic 1: handle + barrel
Pic 2: put them together
Pic 3: trigger + barrel
Pic 4: put them together
Pic 5: put the mag bottom and the sides together
Pic 6: fake mag + barrel
Pic 7: put them together
Pic 8: firing pin + barrel
Pic 9: shove in the firing pin
Pic 10: side panels + barrel
Pic 11: put them together
Pic 12: handle for walking
Pic 13: put them together

Step 10: Rubberbands Emplacement

Picture of Rubberbands Emplacement

Pic A: put the rubberbands like so

Pic B: Put the rubberbands like so

Step 11: The Ammo

Picture of The Ammo

The ammo is red rods as shown

Step 12: It's Done!!!!

Picture of It's Done!!!!

Well, you've got yourself the Scorpion 360 C.D.M
have freaking much fun with my knex gun!!!


the_boss_builder (author)2012-05-06

a built it and when i fire it w/ a red or gray rod as the ammo it kicks back! ! ! ! !

guitar-hero (author)2011-05-22

Hi, I have made a new bullet for you rifle​​, this is the link to the instructable:

Skreetsha (author)guitar-hero2011-05-23

It's not really a rifle, but whatever. Lol

guitar-hero (author)Skreetsha2011-05-23

mini rifle dan, sommige mensen (mberg bijvoorbeeld) vinden het een mini AK-47 lol

Skreetsha (author)guitar-hero2011-05-25

Lol, lijkt het mischien op maar dat was niet echt de bedoeling

guitar-hero (author)Skreetsha2011-05-25


dansdoc (author)2010-11-30

i can ballance it on mag!

Skreetsha (author)dansdoc2010-12-07

Lol, same

dansdoc (author)2010-11-30

what kind of sized rod is carrying handle?

mberg (author)2010-11-16

it kinda (KINDA) looks like a AK-47.

Skreetsha (author)mberg2010-11-18

LOL, i don't know what AK's in your country look like but definitely not like this! xD

mberg (author)Skreetsha2010-11-18

sorry. i meant to say mini

guitar-hero (author)2010-08-26

cool geweer, maar kan je misschien kijken of je een werkend magazijn kan maken?

mrmplaster (author)2010-07-31

viccie i dont have any bendy blue rods for the mag any ideas

mrmplaster (author)2010-07-30

are the blue rods bendy because the normal dont work

dansdoc (author)2010-07-10

yes you can add duct tape

knex shooter (author)2010-05-09

 gonna build it, untill i have no bendy rods, any like way around it 

H1T4TCH1 (author)2010-04-12

 hey viccie speel jij heel heel misschien prototype?

Skreetsha (author)H1T4TCH12010-04-23

Nee da's gewoon een heel erg fout afgelopen Spiderman rip-off.
GTA Episodes From Liberty City is nu uit voor de PS3. da's meer mijn ding.

H1T4TCH1 (author)Skreetsha2010-04-27

 haha ok want ik speel(de) het wel en daar komt dus 'ctitical mass' in voor... ik vroeg me 't gwn ff af :P

KNEXFRANTIC (author)2010-03-06

how do you load it

dwhdwhdwh (author)2009-08-21

no offence but why do most people think block triggers suck when these guns dont shoot good or work good in any way.

Skreetsha (author)dwhdwhdwh2009-08-22

Because, in my opinion; It's ok to build a block for just a fun day shooting, but not to post it. They are to easy to build and if you built one out of a Instructable here, you'll never forget how to make a block so more Ibles are unneeded after that.

dwhdwhdwh (author)Skreetsha2009-11-16

sorry your gun is very good and i wish i could make it but my block trigger guns shoot 75 to 100 feet and are ultra compact( i love them).Also they hurt like hell when you get shot, they left a red mark on me 5 inches in diameter for about 3 hours.

DJ Radio (author)dwhdwhdwh2009-11-23

So can a Killerk pistol. 

KnexFreek (author)DJ Radio2010-02-26

 actually with good bands and a grey or red rod it might penetrate skin easy

dwhdwhdwh (author)Skreetsha2009-08-22

its still a pretty sweet gun though

dwhdwhdwh (author)Skreetsha2009-08-22

k i get it

redrover95 (author)2010-02-16

you can also use yellow and blue rods for ammo they go a little farther btw really awsome gun

rrr67 (author)2009-10-31

instead of rapping a rubber band around it about a million timez, can't i just duct tape it

Skreetsha (author)rrr672009-10-31

Yeah, but make sure it can't fly straight through the barrel.

DJ Radio (author)Skreetsha2009-11-02

He should do both. 

yeolddingdong (author)DJ Radio2009-11-23

are you cool or dumb please dont flag me im just curios

Lowney (author)yeolddingdong2009-12-10

Is there anyone who would reply with "I'm dumb"?! What kind of question is that?

DJ Radio (author)Lowney2009-12-10

The stupidest question in the universe.  I mean, if you're really gonna ask that, why don't you ask yourself that question first, then pick the second answer.

Lowney (author)DJ Radio2009-12-10

"Uh...the second? Okay, uhhhh, omygosh I'm dumb? Uhhhh...but I'm not dumb..."

DJ Radio (author)yeolddingdong2009-11-23

What the?  That doesn't even make for a good question. 

dirtnap (author)DJ Radio2009-12-10

Lol at that kid.

rrr67 (author)Skreetsha2009-11-11


rrr67 (author)2009-11-12

wats dat blue rod @ the end of the barrel?

rrr67 (author)2009-10-31

Miles Tails Prower (author)2009-06-27

I know that everyone wants the magazine to actually work. I WILL MAKE IT WORK!

Here you go. Like it? I also redesigned it a little bit. The magazine is also removable.

It's hard to see with a vga camera

Ecr72 (author)2009-08-05

aaaagh! my fingers, they hurt so much!!!

DJ Radio (author)Ecr722009-08-23

You get used to it. If you are new, it hurts more. and if your fingers hurt now, dont build the knexsayer, they will make your hands bleed.

knex_mepalm (author)DJ Radio2009-09-11

lol now ive used so much my hands were bruised bleeding at least 14 times in 3 -4 months and i purposely cut my skin and the sking layer is like 2-3 mm thick, omg

mettaurlover (author)DJ Radio2009-08-26

That's why I use pliers!

DJ Radio (author)mettaurlover2009-08-26

I use pliers when I build something like a killerk handle.

legogunman (author)Ecr722009-08-12

at least there not bleeding

About This Instructable



Bio: Favourite games are LittleBigPlanet2 and Gran Turismo 5. Favourite music genre is drum and bass, but my current favourite song is Gorillaz - Clint Eastwood. I ... More »
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