Introduction: MHMG

Picture of MHMG

This is my Masterdude Heavy Machine Gun (MHMG). It is made for power and shooting a lot of ammo in not a lot of time. It shoots the same ammo as my MBSR and has a hi-cap magazine. It also has a large bi-pod and can have a strap.

-Strap compatible
-Trigger guard
-Large ammo
-Hi-cap magazine

-Uses too many pieces for some

More Instructables by me.

Image 1: View of gun with bi-pod.
Image 2: View of gun with strap.

Step 1: Main Body: Making the Components

Picture of Main Body: Making the Components

Make the following. Due to the large amount of parts each part will be assigned a letter:

Image 1-2: Make 3 of each. (Parts A & B)
Image 3: Make 2. (Parts C)
Image 4: Make 1. (Part D)
Image 5: Make 2. (Parts E)
Image 6-8: Make 1 of each. (Parts F, G, & H)
Image 9-10: Make 2 of each. (Parts I & J)

Step 2: Main Body: Construction

Picture of Main Body: Construction

Follow the images:

Image 1: Add a blue rod to Part C.
Image 2: Add a blue spacer.
Image 3: Place Part J but don't connect, blue spacer, and blue rods.
Image 4: Add Parts A, B, E, and F and white rods.
Image 5: Add Parts A, B, F, H, I
Image 6: Add Parts A, B, E, and F and a blue spacer.
Image 7: Place Part J and a blue spacer as shown.
Image 8: Add Parts C and G, metallic blue and tan clips where shown.
Image 9: Add metallic blue clips and blue rods where indicated.

Step 3: Bi-Pod

Picture of Bi-Pod

Follow the images:

Image 1: Make 2 of these.
Image 2-3: Make 2 of these.
Image 4: Attach the earlier made parts as shown to make 2 of these.
Image 5: Add white rods to a white connector as shown.
Image 6: Add parts to make this.
Image 7: Cover with a white rod.
Image 8-9: Add red connectors where shown on both sides.
Image 10: Connect the legs to the main bi-pod hinge.
Image 11: Connect to gun's barrel as shown.

Step 4: Strap

Picture of Strap

When adding a strap, attach the strap where indicated.

Step 5: Loading and Firing

Picture of Loading and Firing

To load, take the blue rods at the ammo feed off and hook the rubber-band at the end of the barrel and the spokes at the back as shown in the images below. Then place the blue rods back into place and then load the magazine as shown with the ammo shown. Add the ammo pusher made in the gun component step as Part D.

Image 1: Standard ammo.
Image 2: Armour piercing ammo. White rod at tip can be sharpened but I advise against it.
Image 3: Mag loaded.
Image 4: Rubber bands hooked on tip of barrel.
Image 5: View of ammo feed when loaded.
Image 6: View of spoke when loaded.

Warning- This may cause harm or injury if misused. Do not point it at people. I am not responsible for damage, injury, or death caused by this instructable.


Valkyrie103 (author)2010-05-04

Holy Crap! This is an awesome K'nex gun!

killersir751 (author)2011-07-23

Very good gun, looks creative and very good.
Also, I'm gonna buy more knex but all I have to spent is £20.
Where would you reccommend buying knex?
The actual knex store (, Amazon or any other sites (I don't trus Ebay.

shieldsam (author)killersir7512011-07-31

google knex user group, they sell every knex piece ever made for really cheap. i got about 500 pieces for less than £10

killersir751 (author)shieldsam2011-07-31

Awesome, thanks.
I will check it out.

shieldsam (author)killersir7512011-09-02

Knex user group !

killersir751 (author)shieldsam2011-09-04

I have already checked out knex user group and they do have a few good deals/offers, I don't think i'm gonna buy any.
I'm quitting K'Nex and moving onto modding NERF guns/blasters.

Masterdude (author)killersir7512011-07-26

I find garage/yard sales to be a good source but I don't know if you would be able to find any near you. I myself also don't trust Ebay but Amazon could be a good choice. I'd choose a tub of K'nex, not a set, and not one with those K'nex bricks because they are useless (well atleast for me).

killersir751 (author)Masterdude2011-07-27

You really do think like me, but I don't know anyone in the area that I live in that does garage/yard sales.
I don't find the bricks useful either.
I will try Amazon and try to find the best deal.

~KnexBuild~ (author)2011-07-04

This is a really cool gun.How far does it shoot? 5*

Masterdude (author)~KnexBuild~2011-07-18

I'm not sure, I made it over a year ago.

Fred the evil puppet (author)2011-04-26

Er... How does this fire more shots per second that any of your previous guns?

It doesn't. It just has a greater ammo capacity and shoots larger ammo (hence the "Heavy").

Fred the evil puppet (author)2011-04-22

Wait a minute, the RBG wheels only hold
8 shots. The mag hold about 30. Please explain?

If you keep on pulling the wheel back when loading, you can put more than one rubberband per place on it.

Mr. Muggle (author)2010-05-04

if it's semi auto it's not a machine gun...

Masterdude (author)Mr. Muggle2010-05-04

Well, it's my version of a machine gun. I tried to add a motor to it to make it full auto in a way but the motors I have are too weak and even when I modded it to 6 batteries from 2 it was to slow to be practical.

Is this a machine gun or not?!

If a machine gun is fully automatic, then no, however if it's a gun which can obtain a high rounds per minute and has a large ammo capacity, then yes.

I don't understand.. Is it semi auto, full auto or what?

It's semi, not full, auto.

Fred the evil puppet (author)2011-02-28

So you're telling me...
This is a powerful, non chain fed, good looking,
Mobile , not too many pieces Knex gun.
5* and if I could, 5000000*!!!!!!!

Well, I'd probably have to disagree on the number of pieces. It Does use quite a lot of pieces.

Not for me!

Fred the evil puppet (author)2011-02-28

How many shots in a mag

I don't remember exactly but probably about 30, more or less.

thecrow117 (author)2010-05-07

you didi  a pretty good job on this

TheChemiker (author)2010-05-03

Sooo, another overdone rubberband gun, right?

Masterdude (author)TheChemiker2010-05-04

I usually try to get as much power as possible out of my guns.

TheChemiker (author)Masterdude2010-05-04

With this is it power or size?

Masterdude (author)TheChemiker2010-05-05

Kind of both. Maybe not as strong as my sniper (MBSR), but it uses large ammo and it is rather large ammo.

Masterdude (author)Masterdude2010-05-05

Larger than most of the guns I make use except for my MBSR.

Millawi Legend (author)2010-05-05

Pretty cool, 5*s, I give everything 5* lol.

~KGB~ (author)2010-05-03

typical, a great gun from you! lol, 5*

Seleziona (author)2010-05-02

looks good! 4.5*

rec0n (author)2010-05-01

Holy crap! 5*!

About This Instructable




Bio: 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 ... More »
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