Picture of Nerf Vulcan Modification Project
In this Instructable, I will be documenting the modifications I make to my new NERF Vulcan EBF - 25 fully automatic Nerf gun.

Many of these modifications are NOT REVERSIBLE , and, if done wrong, will result in irreparable damage to the gun.

Also, i know it's kind of obvious, but performing ANY of these modifications will immediately void the warranty, so don't complain that the store refused to take beck your broken gun! - Note, Some people have commented that Wallmart took back their broken guns after failed mods. THIS IS NOT NORMAL! Toy companies do not follow the maker's creed of "If you can't open it, you don't own it!"

I will also point out key parts that I think should be made of metal, along with CAD drawings of said parts.

All the images in this instructable are available in high quality (so you can actually see what I'm talking about). Just click the boxed "i" in the top left of the image, and click "Original File"!

And, as always, wear safety glasses when playing with modified NERF guns, the darts won't have much of a problem giving you a black eye!

DO NOT MOD A NERF GUN WITH BATTERIES IN IT! 9 volts isn't a lot, until you add current!

The steps are numbered in the following manner:

M # P #, Name
meaning: Mod # Part #, Name (if first part)

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Step 1: Pre Mod Stats

Picture of Pre Mod Stats
Here are the stats on the gun, Pre-Mod:

Flight Distance:
Initial 50.27777778'
Bounce 5.861111111'
Total 56.13888889'

Looking at these numbers, the gun did really well pre-mod, better than any other Nerf gun I've used.

Step 2: M1 P1, Belt Air Restrictor Removal

Picture of M1 P1, Belt Air Restrictor Removal
The belt on the Nerf Vulcan has some annoying air restrictors in it that need to be removed, but, if you cut too much plastic, the gun won't work.

This mod doesn't do much on it's own, but combined with the removal of other air restrictors, it's incredible.
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gammerguy8 months ago

is there an air restrictor in the firing mechanism? because mine still doesnt fire that far...

Yep he mentions it in this instructable

I see...

PONG1231 year ago
Cool its so much fun to have a Nerf war with
nicdepro1 year ago
awesome thx
Im going to buy two slightly used nerf vulcans from a friend, can you reverse the polarity of on of the belt motors and do some cosmetic changes to make one of the guns belt feed from the opposite direction and still work.
That would probably reverse the entire firing mechanism, so it would feed backwards but it wouldn't fire.
Zinventor (author)  MasterDraco2 years ago
sadly no, the feed mechanism is a One Way ratchet that works by pulling an angled lever past teeth on the belt holder, regardless of which way the motor turns, that part will still pull the belt in the same direction.
Lol MasterDraco, your avatar is from a movie I watched :D I liked that movie!
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Ya... that'll be cool (And the dragons are still pets?)!
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Lol... of course they will be pets XD
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Lol, haven't I?
Zinventor (author)  Legoman2001193 years ago
Sadly that won't work... The firing mechanism works by reciprocating motion, and the belt advance will only work in the correct direction. I ruined my first Vulcan when the belt got pulled backwards, and broke the ratchet mechanism...
I have a used vulcan, and it isnt shooting as far as it is supposed to. Will changing the batteries help? Thanks
Zinventor (author)  waffleman2.02 years ago
Wow it's been a while since i've logged on, sorry, but yes, replacing batteries will help a lot on firing speed.

Distance won't change, since regardless of speed it's still pulling the bolt back the same ammount, but at some point the motor won't be able to get the bolt all the way back. Try putting in new batteries and it should work better!
melder32 years ago
A much easier and cleaner way of doing this is to use a small pair of wire cutters and simply snip the pieces of plastic holding the pegs in place. Two quick snips on each peg and you are done. It took me less than 5 minutes to remove all of the ones from my belt.
GASSYPOOTS3 years ago
can u do it with stampede?
Cool Mod! I did not take the AR out of mine I actually Modded it to run on a
9.6 Volt RC Battery And it worked really well! So I got a new Vulcan and I thinl i am going to Take out all the AR's then mod it to run on a RC Battery? Sounds Legit right?
So, I have a Vulcan, and it's NOT that easy to take off the feed cover. I took out the two hinges screws and it wouldn't come off. Is there something special needed? Because something is holding both sides in.
Yes there is a round orange bit which the screw is inside (both sides).

I attached a picture below, if you haven't got it yet (I know its been a week since you posted).

I used a Phillips screw driver and just lifted it upwards.
It isnt shoot as far And fast as it i supposed to.
cleage0014 years ago
how can i get the piston disassembled? dad said that solvent ruins plastic and hot water might work
edit: i dont wanna do it anymore and ruined auto-blasting. i wanna fix it!!!
That happened to me to. Put the air restrictor back in.
i didn't even managed to get it out! i tried putting the piston back in but it just makes a noise like "vrrrrrrrrrboomvrrrrrrrrrrrrrrrboom" but does not blast! it's a machine gun and not a sniper rifle! i wanna mow down enemies!
??? I don't understand
it makes the original noise, but the follower wheel does not pull the belt, nor does it fire...
Hmm, maybe you screwed it too tight?
Maybe you wired it wrong so that the wire is stopping the wheel from moving?
Oh. my. god. That makes all sense! Thanks a lot. I'm just 13 and wasn't able to think through it.
Hey what happened with yours? I'm having the same problem
a wire was stuck and the electric current wasn't flowing
dude im only TEN and i could think it through.
nbagf3 years ago
found a motor that would be almost perfect for an upgrade :)
Eoxan3 years ago
my piston wont open. i have taken the screws out and tryed levering it out but it wont budge.
lwilton6515 years ago
awesome project  i just though id imput some wisdom.


The stock motor is 32mm long, 27.6mm in diameter, and has a shaft diameter of 2.4mm.
To replace the motor with a better one u need  the size of it.
380 size is generally 28mm dia. 35-40mm length.
while 370 is 24mm dia. 35-40mm length.


to strengthen the gearing and things use delrin. delrin is a composite plastic that is stronger than average placic without being to heavy.

ni-mh are probably the best choice of battery for this you can get them for rc cars. Li-po is the other option it is lighter and more powerful, but it is much more expensive and can explode if u dont use it right.

All the things listed are designed for application with rc vehicles.
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