The Ultimate Nerf Vulcan Mod




We made a NERF chaingun fire about as fast as a 7.62mm M60 Machine gun. That's around 500 rounds per minute (RPM). We did two major modifications, increasing the voltage to the firing motor, and adding a round counter and a paint job.

The total cost on this hack was about $79

Step 1: What You Need

For this modification, you need the following:

Upping Voltage:
  • 1 x Nerf Vulcan EBF-25 ($50)
  • 2 x 9.6v battery packs
  • 2 x 9.6v battery pack connectors (RadioShack)
  • 2 x Alligator clips
  • 3 x Wire nuts
  • 1 x Ballpoint pen
  • 1 x Chopstick
  • 1 x Mana Energy Potion
  • 1 x A hint of stupidity

Painting/LED Mod:
  • 1 x LED counter from QKit ($18)
  • 1 x Lever/Roller microswitch
  • 1 x LED
  • 3 x Momentary pushbutton switches
  • 1 x 12v miniature battery
  • 1 x Coil of wire
  • 1 x Various paints

Step 2: Cranking It Up

The first modification was to increase the voltage to the motor. More voltage with available amperage means a faster spinning motor. Faster motor means more rounds down range, or into a co-workers face, as the case may be.
The Nerf Vulcan EBF-25 starts with a requirement for 6 D-Cell batteries. That's an expensive number of big cells. When wired, they yield about 9v.
To connect the battery packs to the gun, we actually had to make a little tool. The power terminals are too deep inside the gun to clip on the alligator clips, so I took apart a ball point pen, slit up the side, put a compressed alligator clip in it with the lead hanging out the slit. I put the alligator clip on the battery terminal and then pushed a tie-wrap (or chopstick) through the back of the pen, slipping the alligator clip out and hooking it on to the power terminals. it worked like a charm.

Step 3: Wiring the Beast

Hook the battery packs together like in the photo. *WARNING: If you hook this up wrong, you could dead short the battery packs together which could make them explode or do other scary/injurious things.* Hook the negative power terminal from the gun to the black lead on pack A, hook the red lead from pack A to the black lead on pack B, and then hook the red lead from pack B to the positive power terminal on the Nerf gun. Voila. It's done. Now separate the alligator clips with a piece of cardboard to keep them from shorting. Stuff everything back into the gun and close the door. Now you have a 500 round per minute cube warfare weapon of mass destruction.

Step 4: Adding the LED Round Counter

It took me about a half hour to solder together the counter from QKit. A big part of that time was trying to figure out which resistors were which, so make sure you have a guide before you start. Instead of using the microswitches from QKit, I soldered leads from their locations on the circuit board to pushbutton switches mounted on the gun. The three switches are Set, Program, and Reset. The LED comes on when you run out of ammo, which was accomplished by just hooking it to the "out" pin on the counter.

Step 5: Add the Counter House

We took the top of the ammo box off and used it to house the counter. Dremel out the spot for the LED counter out. We dremeled part of the chain-gripping assembly to mount the roller switch. This way the links would hit the switch each time the belt advanced. The leads from that switch go to the counter through holes Dremeled in the top of the chain guide.

Step 6: Paint the Gun

This was accomplished with a base matte black primer coat, and then metallic silver paints mixed with various levels of black to give variety to the metal pieces. Put metallic silver on black parts that would show wear, like behind the charging bolt or near buttons. This was our variation, but the sky is the limit with design possibilities.

Step 7: Attach Round Counter to Finished Gun

Take the round counter and insert it into the dremeled out top piece. This can be accomplished with velcro, or another adhesive. There is enough room to tuck all wiring underneath the casing. Attach the top piece to the body of the gun, and you should be all set.

Step 8: Fire Away!

Now that everything is set, switch the gun to automatic and have a blast! Literally.
You can check out the video of our gun in action here:

We are also giving away a 12-pack of mana to the first person to send us a video of getting this gun past the elusive 600RPM mark. Details are in the video. ****UPDATE***** Someone already won the contest. Thank you everyone for trying!


1) We're not affiliated with Nerf, Radio Shack, QKits, Dremel, or anything else you saw us use to build this. Mana Energy Potion is the exception, because that's who we are.

2) There's a very real danger to doing this mod. Dead-shorting battery packs like these can cause them to explode and injure you. Nerf even has a "Do not modify this dart blaster" warning on the gun itself. That's where we used the Dremel to cut out the panel for the LED counter.

3) You will probably ruin your Nerf dart blaster. We could smell the motor burning when we fired it with 4x the voltage. Eventually, the motor coil will probably melt. Also, the gears will probably strip out.

4) Don't paint over your orange tip. That's illegal as far as we know. Fortunately, the orange tip is separate, so you can paint your gun and then attach the orange tip.



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    273 Discussions


    Question 1 year ago

    does this require 2 battery packs?


    4 years ago on Step 3

    As cool as it is, that will shorten the lifespan of the motor, and if fired for to long it might get really hot and melt the plastic.

    2 replies

    Reply 1 year ago

    just add a more powerful motor that way it is ment to handle the power and go just as fast


    Reply 2 years ago

    aren't you supposed to replace the plastic flywheels with a metal flywheels and put a metal cage around it? it is expensive but it does work and many modders use this.


    3 years ago

    It's Cool tho!!


    3 years ago




    4 years ago on Introduction

    I'd just like to say this to the people who are noting that it overheats and risks burning out the motor/melting the plastic-- The real Vulcan, the M249 SAW, also has overheating issues. You have to fire in bursts with it, rather than just spraying. Heck, barrel wear is such a large factor in combat that HMGs (heavy machineguns) like the M2 .50 cal tend to bring spare barrels just so the gunner doesn't have to wait for it to cool!


    4 years ago on Introduction

    Wow! Sooner or later someone will make a gasoline powered nerf gun and the world will end... =)


    6 years ago on Introduction

    Is there a way to complete this mod by vamping down the voltage (slightly) so as to get a rapid fire rate without risking burning out the motor? Any forum on this?


    10 years ago on Step 8

    Ever thought of hooking it up to a power outlet? It'd only last for a few seconds but I'm sure you could get more that 500RPM out of it.

    6 replies

    Reply 10 years ago on Step 8

    Power outlets are AC, batteries are DC. Unfortunately, if we hooked it to a power outlet it would fry before it even got a shot off :-) Fun idea though. It would at least by arc-tastic

    If you wired a rectifier (or is it inverter) before the gun it would convert the A/C current into D/C. Though the 120V might be just a little too much for the gun to handle.


    Reply 6 years ago on Step 8

    build a step down transformer? 1000 wire wraps on one side, 200 on the other. goes from 120V to 24V then add a rectifier. Should last more than 30 seconds if used in moderation. :P

    you would need, a variac and a full bridge rectifier,. put the rectifier on the output, and then crank it right up!!