This is my first Instructable, So hello.

Have you ever thought what would happen if you combine LEGO with Nerf? Well it turns out you get this....
I have had two of these guns for about a year now, and want to share it with the world now that I have finished university.
The concept came from the barricade, and wanted to modify but I didn't want to damage it (as it was a present from a friend).

-Range: over 15 meters /50 feet
-Rate Of Fire: 35 darts in under 17 seconds
-Lithium Ion powered (14.8v 900 MAh) lasts up to 8 Hours of use
-Sturdy in battle, no bits drop off when being handled roughly, yet the parts are not glued together in any way, only 3 switches are glued onto the sides of a few bricks.
-Firing push rod always resets itself to quickly fire the next shot, with a smart circuit to eliminating misfiring.
-Light enough to duel wield. (The club I was in stopped me doing so, as I consistently owned them with it) ^_^
-Volume is less than the Nerf Barricade
-Customizable color (red, blue, yellow, white, black or a combination of them)

Well...... see what you think (And if you like it Please Comment, Rate and Vote for it)
And if you are building it, please let me know how it is going/went.

Firing demo:

A 3D look at the gun.

A close up look of the internal mechanism:

As you can see from the video, there is a easily accessible safety switch which turns the gun on and off, and a Voltage indicator that shows my gun is 90% charged.

The video shows how the push rod always resets itself back into the same position every time a shot is fired, without this circuit there was a potential lag between pressing the trigger and firing a shot, the circuit also eliminates the gun miss-firing a second shot.

The cogs are used to slow the motor down 5:1, there is potentially a way to change the gearing to increase the rate of fire, I like the speed that it is now, but feel free to experiment.

cbotics made it!15 days ago

One of my all time favorite projects to make. I messed up my relay so I went without it and the gun still works great. I added a hinged cover for the battery box inside and a few other minor changes. The LEGO design makes this so easy to add onto and modify. Thanks Raptor for this awesome project.

lego nerf gun.jpg
sonic broom8 months ago

That is so cool! make one out of knex.

Da-JinC11 months ago

I don't know if this will be answered, but how do you keep the clip from falling out? I am trying to build a lego Mindstorms version, inspired by this one. Also, approximately how fast are the flywheels spinning? Do you think I could build it with smaller flywheels, or should I buy that part 2903?

Johnhall141 year ago
=D I like it =) neat idea.
OMG that's epic!!!!!!!! man that must have taken SO long to build!! Nice!
Krayzi993 years ago
Maxaxle3 years ago
That's actually pretty ingenious.
modaawesome3 years ago
tis is awesome i saw it and thought no way but it is lego cool
wow i rerly look at the lego projects but this thing is wiked nice job dude
Epic! Genious Mechanism!
Raptor Z (author)  dr. richtofen3 years ago
Thanks, I designed it with practicality, and reliability in mind.

It was strangely easier to make it fully auto than semi auto.
I have also managed to upgrade it to get 80 feet (level)
no problem, 80 feet with a nerf dart? thats great!
Raptor Z (author) 3 years ago
Woo, I just got some replacement motors from Lego ^_^

I will also be posting a tutorial on how to repair a few causes of the seizing problems with the 71427 Lego motors, and how to repair/upgrade the speed of the 2838 motor.
gnelson1033 years ago
cool but way to hard
Raptor Z (author)  gnelson1033 years ago
If its the circuit that too hard to design, you can leave out the relay, however the gun will miss fire. (see the two images below)
If your interested, I could document a simple on/off circuit with only 2 in-line switches.
gnelson1033 years ago
dang thats a lot of stuff to have
hrodriguez73 years ago
its better than the vulcan EBF25
Nicely done! The wheel drive is genius. Seems like there would be a way to feed the darts faster, but I suppose the slow fire rate helps to increase clip duration.

Overall this is possibly the most practical leggo gun I've seen that you might actually want to use in a battle.
Raptor Z (author)  NightHawkInLight3 years ago
Yes, the gearing can be changed to increase rate of fire, but on my attempts it reduced the range as I think the ROF was too high and the flywheels lost momentum, however using a voltage/speed regulator, and low ratio gear would allow you to tune the ROF perfectly.
I have the gearing of 5:1 to allow for the most basic circuit I can make do the job, however improved circuits could be made using Semiconductors.

potential gear ratios (not sure if possible to build on gun though)
8,40--------5:1 (current)
16,40-----2.5:1 (this was too fast)
lemon rind3 years ago
Great job bro!
I clicked this. I looked at it and kept staring at it. I now can't read. I think my mind blew up from the awesomeness of this. COMBINING NERF WITH LEGO. EPIC WIN. (But seriously, my mind did not blow up, but it is still cool. I give it infinite stars.)
monsterlego3 years ago
Looks like you put a lot of effort into this, good job!
ramicaza3 years ago
BTW, you're instructable was documented LIKE A BAUCE
Raptor Z (author)  ramicaza3 years ago
Thanks, I spent way to much time making the tutorial (over the last 4 months) but it only took a week to prototype and build the gun ^_^

Oh, in case anyone is interested, built time on my second gun was 1 hour for the Lego, and 2 hours for the improved wiring. But I think it should be possible to build a new one in about 2 hours (excluding curing time for the glue, and finding the pieces in the lego box)
WOW. 4 months... didn't expect that. Did you use that one lego builder program from the lego site?
Raptor Z (author)  ramicaza3 years ago
Its not as bad is it sounds, I have been very busy and haven't had much time to make the tutorial, so i worked on it whenever I had a bit of free time. 

The program I used to design the gun was MLCad (a very powerful LEGO Designer)
I rendered the front cover image using Pov-Ray,
and the LEGO step by step guide was made in LPub.

All the above, and other required programs to get you started can be downloaded in the LDraw All-In-One-Installer.
ramicaza3 years ago
That's pretty nice, good job :D makes me wanna get into legos and nerf again. hmm might try making my own version with a friends old nerf gun
polaris 2503 years ago
Raptor Z (author)  polaris 2503 years ago
Thanks ^_^ a lot of time and work has gone into making it (well building it took my mind off doing my university Final Lear Project)