Introduction: MASMG

About: I make K'nex guns, specializing in semi-automatic, RBG-Slingshot hybrid systems which i use in most of my guns. Note: I am not responsible in any way for any damage, injury, or death caused by my Instructab...

This is the Masterdude Automatic Sub-Machine Gun, a fully automatic version of my MSMG. After many attempts I've finally created a practical method of fully automatic fire. It works by making the trigger let the spoke go and having a delaying mechanism (like the one in my K'nex Grandfather Clock) which slows the spoke to a rate at which the rubberbands go (without a delay mech the bands go so quickly that the ammo doesn't have enough time to feed into the mech before the next band goes). One of the results of the delay mech is that it creates a noise and blowback-like vibrations (a good thing maybe? More realistic).

More instructables by Me

-Full auto
-Removable mag
-True trigger with trigger guard
-Decent strength

-Takes a while to reload

Step 1: Components

Make the following:

Images 1-2,6-9: Make 1 of each.
Images 3,10: Make 2 of each.
Images 4-5: Make 3 of each.

Step 2: Construction

Assemble as shown.

I know I usually give detailed written instructions, but I don't have lots of free time so I hope this images will be enough. I tried to make clarifications and notes where necessary.

Step 3: Mag

Image 1: Make 2 times the contents of the image.
Image 2: Make these.
Images 3-5: Put them together like shown.

Step 4: Use and Warning

Load the bullets into the mag as in my previous guns, and pull the rubberbands onto the spoke, also as in previous guns. Pull the mag pin out.
To fire make sure the safety is off and pull the trigger. Let go to stop firing.

Warning: This gun can cause damage and/or injury. The safety and other mechanisms can fail so always treat it as armed. Do not point at people, things, or animals.I am not responsible in any way for any damage, injury, or death caused by my Instructables. You are totally responsible for any damage, injury, or death caused by my Instructables. Use common sense when making and/or using them.

Be the First to Share


    • Puzzles Speed Challenge

      Puzzles Speed Challenge
    • Secret Compartment Challenge

      Secret Compartment Challenge
    • Lighting Challenge

      Lighting Challenge

    15 Discussions


    Wow. I've been waiting for the day that a full-auto gun appears on this site. If I get time, I may build and see what it does.


    Reply 7 years ago on Introduction

    Do you mean developing the gun? If so then I've been trying on and off to make an automatic gun for as long as I've been on I'bles (a couple years). Then a couple months ago I got the idea of adding the mech from the clock as a timing/delaying mech. I made a prototype, and then for the next months been making small changes and procrastinating on making the post.