MOCpages : Share your LEGO® creations
LEGO models my own creation MOCpages toys shop Machine gun with functioning ammo belt, shoots really =< - - - - - -Military
Welcome to the world's greatest LEGO fan community!
Explore cool creations, share your own, and have lots of fun together.  ~  It's all free!
Machine gun with functioning ammo belt, shoots really =< - - - - - -
Machinegun with functioning ammo belt, the LMG 66 ( Lego Maschinen Gewehr 66 ) Shoots rubber arrows. Works like real gun. Inspired by MG42
About this creation
I had these lego cannons and was wondering how to shoot them more than one at a time.
I tried to create all kinds of fixed cannon systems, but they werenīt so good.
But then I noticed that the new cannon ( 57029 flat bottom ) has space enough under it for technic beams, which the older version ( 32074 round bottom ) did not have.
I build various kinds of belts from technic beams, but they all failed.

But one day I was watching a video of a lego caterpillar and noticed that treads
( 57518 link tread wide ) have standard holes in them. I realized that those cannons
can be connected on those tread holes. So I built a real shooting belt.
Belt of 75 shots did cost around 50 euros, a reasonable price for having fun.
Special thanks to realpink from Bricklink for those cannons!

Next thing was to create something to run that belt and shoot those arrows.
Something like MG42 ..
After 665 trials I finally came up with this version. Biggest problems were with reliability, gun jamming and breaking. Gearbox was exploding time to time, loose
pieces etc....
If an arrow stopped in the barrel, it was stuck with next arrows in a split of a second.
But now, after 10000+ test shots, itīs working quite alright.

The belt drive is made of 2 small drive wheels ( 57520 ), synchronized with gears.
In and out guiding rollers were added to make the belt flow smooth.

It is powered with an XL-motor and, having a 4-speed gearbox, yes, it is the worldīs
first machine gun with gearbox. You can even change gear during shooting.

Triggering arrows is very simple, a technic cam 6575 works as a wedge that pushes
cannon trigger backward. You can see on top of gun the trigger adjuster.

1. gear is for loading the belt to gun.
2. gear is for economy shooting
3. gear is for normal shooting
4. gear is the TURBO for maximum destruction ;)

Gear ratios: ( fresh battery )
1. = 0.33, about 3 shots/second
2. = 0.55, about 6 shots/second
3. = 1.00, about 10 shots/second
4. = 1.67, about 15 shots/second, makes about 900 rpm, good machinegun speed.

The fourth gear was filmed with a video camera and every frame was checked to see
how long it took to shoot 10 shots. Fresh batteries and a belt of 10 was used.
With a shooting distance of 20cm, up to 3 arrows was seen flying at the same time.

Loading a full belt of 75 takes 2 minutes and shooting it takes under 10 seconds.
Meaning that 95% of my time is just loading the belt. And finding all those arrows around the room.
My loading record is 90 arrows in 120 secs, but I would be happy to see someone else to do the loading ;).
One arrow unit is 1 inch width, so a belt with 100 arrows is 2.5 meters long!
I've got those cannons 100+ ;)
Normally I have belts of 25 and 50 in use.


Everybody who tried this gun has laughed a lot ;)
Please do not take this weapon too seriously !
This is so far just an experimental weapon, but it looks and sounds pretty real.










A belt unit is made of these pieces:
57028c01 Technic Competition Arrow x 1
57029 Technic Competition Cannon, Flat Bottom x 1
57518 Technic, Link Tread Wide with Two Pin Holes x 2
6536 Technic, Axle and Pin Connector Perpendicular x 2
32062 Technic, Axle 2 Notched x 2
32002 Technic, Pin 3/4 x 2




Guiding-piece and few arrows


Inside view




Gearbox seen here


Breech view


Trigger, Technic cam (yellow) seen here. nothing movable !!


Snapshot from LDD-file


A feeding problem at turbo speed started to happen too often. Maybe because of wear of parts ... But I solved it by modifying the feeding rails.


Gun barrel colours changed to more realistic


Belt of 50 rounds with tracers


See how it works !



Building instructions updated !!


Building instructions
Download building instructions (LEGO Digital Designer)

Comments

 I made it 
  March 23, 2014
Quoting Ryan Guy Wow! How much did the entire thing cost because I WANT ONE SO BAG OMG PLEASE PUT THIS ON LEGO CUSSOO I WILL VOTE FOR IT A MILLION TIMES!
Never counted how much ;) But if you check building instructions, there isnt anything special. 1 XL-motor + beams, gears and panels, less than 70 euros. The belt may cost more.
 I like it 
  March 22, 2014
Amazingly amazing
  March 18, 2014
Wow! How much did the entire thing cost because I WANT ONE SO BAG OMG PLEASE PUT THIS ON LEGO CUSSOO I WILL VOTE FOR IT A MILLION TIMES!
 I made it 
  March 11, 2014
Quoting Jeremy McCreary A =very= impressive piece of engineering. Looks good, too, and the video's priceless. (I already have a target in mind. He won't be back in the office for another week -- just enough time to build one if I have the parts.) I get the distinct feeling that I'll find some tasty building tricks in the instructions.
Actually its quite simple, core is 1 XL-motor + 5 gears. Gearbox is optional. The secret is in breech design. It can handle up to 900 rpm of cannons. It took quite long time to make it right.
  March 8, 2014
A =very= impressive piece of engineering. Looks good, too, and the video's priceless. (I already have a target in mind. He won't be back in the office for another week -- just enough time to build one if I have the parts.) I get the distinct feeling that I'll find some tasty building tricks in the instructions.
 I like it 
  February 16, 2014
Awesome.
 I like it 
  October 21, 2013
Fantastic!
 I made it 
  August 25, 2013
Quoting General X (aka SuperSpyX) 90 shots?!? That's a heck of a lot of spring-loaded shooters! I must make! Die evil bunnies! Fantastic!
Hmm .. I think I have them about 100 today ;)
 I like it 
  August 24, 2013
90 shots?!? That's a heck of a lot of spring-loaded shooters! I must make! Die evil bunnies! Fantastic!
 I like it 
  June 25, 2013
Awesome!
 I made it 
  January 31, 2013
Quoting cameron aloi how does the mechanism that actually pulls the arrow launcher back work?
a technic cam 6575 works as a wedge that pushes cannon trigger backward when belt is pulled through breech, its very simple. look at the LDD-file to see details
 I like it 
  January 29, 2013
how does the mechanism that actually pulls the arrow launcher back work?
 I like it 
  October 28, 2012
OH MY GOSH!!!!IT'S THE END OF THE WORLD!!!!BEAST GUN EVER!!!!I LOVE YOU!!!!(JK ;p)
 I like it 
  September 30, 2012
Amazing....just....It needs a longer belt.
 I like it 
  June 15, 2012
what do you want to do as gun?
 I like it 
  June 15, 2012
what do you want to do as gun?
 I like it 
  June 14, 2012
http://mocpages.com/moc.php/328188 it is the shooting browning whith your mechanism
 I like it 
  June 13, 2012
http://www.mocpages.com/moc.php/327476 it's instructions for my browning whith your mechanism
 I like it 
  June 13, 2012
thank you very much!! I have finished to put this in my browning m1919
 I like it 
  June 12, 2012
yes i need ldd file. mael.rob@aol.com
 I like it 
  June 10, 2012
very good I want to put this mechanism in my minigun.have you got ldd instructions? Please answer me on my browning m1919
  February 16, 2012
no! not king kong! but very funny nice one
 I made it 
  February 12, 2012
Quoting George Staples That is awesome! I want one, so I can decimate those evil bunnies!
I'm gonna need silver arrows, because those evil zombie bunnies just won't die ..
 I like it 
  February 1, 2012
Wow!!!!! one of a kind!!!
 I like it 
  January 31, 2012
That is awesome! I want one, so I can decimate those evil bunnies!
 I like it 
  January 29, 2012
This is awesome! I'd have so much fun with something like that! Happy shooting!
 
By re465 .
Add to my favorite builders

27
people like this. See who.

5,191 visitors
26 comments
Added January 29, 2012
 


LEGO models my own creation MOCpages toys shop Machine gun with functioning ammo belt, shoots really =< - - - - - -Military


You Your home page | LEGO creations | Favorite builders
Activity Activity | Comments | Creations
Explore Explore | Recent | Groups
MOCpages is an unofficial, fan-created website. LEGO® and the brick configuration are property of The LEGO Group, which does not sponsor, own, or endorse this site.
©2002-2014 Sean Kenney Design Inc | Privacy policy | Terms of use