How to Make Mr. Doomsday





Introduction: How to Make Mr. Doomsday

About: Im Killer~SafeCracker, I started using Instructables in 2009. I mainly post in the Knex world, but I venture out sometimes. Check out all my instructables, you wont be disappointed! I live for music and I p...

Hey Everyone,
Most of you have heard of Mr. Doomsday. Now you can build it for yourself. 
Mr. Doomsday is a single shot pistol that can shoot any rod (sniper rods included), Oodammo, and gray clips. It gets 60 - 65 feet with Oodammo, and about 45 - 50 feet with gray clips. Those ranges are with 2 64# bands. It has a bullet lock, and a nice handle that uses no black wheels. Also unlike my other guns this uses no cut parts. 

I'm sorry if the instructions are bad. This is only my 22 instructable. lol
Let me know what you think. It only takes a few seconds.
Don't forget to:

Step 1: Part Count.

White: 4
yellow: 16
green: 8
red: 6
light gray: 5
orange: 5
gray: 1

Gray/black: 1 (Use black if you can.)
yellow: 1
blue: 1
white: 25
green: 55

Odds and Ends:
y connectors: 13
ball joints: 6
tan clips: 2
blue clips: 2
back & blue hinge: 1

Step 2: Step 1

Picture 1: Build
Picture 2: Add gray/white rods
Picture 3: Build this
Picture 4: Add it on to the rods
Picture 5: Build
Picture 6: Add it on
Picture 7: Make this guy
Picture 8: And snap it in.

Step 3: Step 2

Picture 1: Make this.
Picture 2: Then add the white rods.
Picture 3: Build these
Picture 4: And add them to the panel.


Step 4: Step 3

Picture 1: Build these parts
Picture 2: Add them on
Picture 3: Add this green rod

Step 5: Step 4

Picture 1: Build this
Picture 2: Add it to the side.

Step 6: Step 5

Picture 1: Add the handle
Picture 2: Make this
Picture 3: And add it on.

Step 7: Step 6

Picture 1: Build these
Picture 2: Then add them to the handle
Picture 3: Get these rubber bands. 
Picture 4: Add the band to the trigger
Picture 5: Add the band to the bullet lock.

Step 8: Step 7

Picture 1: Make this.
Picture 2: Slide them together
Picture 3: Tape it up good.
Picture 4: Put it in the gun.
Picture 5: and put the bands on.

Step 9: Step 8

To fire, pull the ram back and slide the ammo in the end of the gun. Pull the trigger and there you go.

Step 10: You're Done.

You're done!!

Let me know what you think. Also don't forget to:



  • Make it Move Contest

    Make it Move Contest
  • Microcontroller Contest

    Microcontroller Contest
  • Woodworking Contest

    Woodworking Contest

We have a be nice policy.
Please be positive and constructive.




Woh. I'd be interested in doing the same thing. XD What rubberband(s) size and amount did you use?


thats fun to type!!!! MOOWAHAHAHAAAA!!!!!!!!

Awesome. I added a a silencer to mine

15, 3:29 PM.jpg

I made a oodammo mag for this pistol, works great, no jam and no double shots; Should I post it?

7 replies

Me gusta

I guess that's a yes? After easter i'll get on it ;)

Thanks, do you read meme too?

When does the narwhal bacon?

At midnight.

See my slide show for a red dot sight mod!


Hmm. Reminds me of the ZLG. But it does have a different trigger.

1 reply

Different trigger and it shoots ten times better. The ZLG only got 20 feet or so.