Introduction: WeeP 5 Advanced Zapper

Picture of WeeP 5 Advanced Zapper

Playing shooters with the Wii is an enormous fun but all the guns I could find were so bad; using the Wii Zapper you need to use a different trigger finger using just the normal Wiimote-mounted pistols is still bad, because using the A-button is complicated...The solution was using an old air-soft MP5 and get a Wiimote in there. Because the first attempt was really a prototype an a friend of me asked me to if I could build him one as well I decided to comment the building to upload it here. It took me about three days to build it and it was a "learning by doing process".

Things you need (if you don't have'm at home) are:
-A MP5 (for this project I bought one if these toyguns on the Internet. They look like a MP5 and when you push the trigger they make and sound and there is an LED lightning inside the muzzle.

-A Wiimote

-Cables, connectors, buttons (I needed 5 of them because the MP5 came with a triggerbutton and two buttons for the foregripp flashlight), soldering-iron and tools like caliper, screwdriver.

-Some plastic plates (I bought them in a local DIY-store)

This is what I did with the MP5 I found. If you have a diffrent one it could be possible that you need to make diffrent modifications.
I also want to apologize if my english is too bad, but I life in germany and I'm not a native english speaker! ;-)

Step 1: Taking Appart the Wiimote and the MP5

Picture of Taking Appart the Wiimote and the MP5

If you are have a triwing screwdriver use it if not do it the way I did:
get a drill and drill them down until you can open the Wiimote. I'm going to say this only once:
The Wiimote is a sensitive device. Don't hit the board with the drill and be keep in mind that the screws are going to get hot, so that the plastic may melt, which will make things more complicated.
After opening put all the parts falling apart in a zip-bag, we will need them later.

Same with the MP5: unscrew all screws. I made a little sketch which shows where which screw is because they all had different lengths. There was also a ring on the muzzle I had to cut away and the flashlight, because it was glued. Looks like the boys over there in china wanted to make sure that nobody is copying there stuff. =) Remove all the electric stuff in there but be careful with the trigger unit. I used it instead of constructing a new button there.

Step 2: Soldering on the Wiimote

Picture of Soldering on the Wiimote

Because I wanted all the buttons to be used I had do solder cables on the Wiimote board on every button. The only problem is, that the +, -, home, 1 and 2 buttons are small.
Just take the foil over them carefully away and thats it. I used a small cuter.
There is no best place to start with soldering but I thought it wouldn't be bad to start with the small buttons. To find out which side is the right to solder just take a Multimeter, use it in the contactmode (which means it beeps if the two tips have a conductive connection), hold on tip on one channel of the button and the other on another channel on a different button. When the Multimeter beeps it means that those channels are the ones you don't want to solder on. The have the voltage for the buttons on. Solder the cable on the other channel and to that with ever button. All buttons have the same source, so you can keep one tip on this channel and measure which you want to solder on. Don't forget to solder one thicker cable on one of the voltage channels. This will be the "source" cable, whick must go to every button!
I used ductape to keep the cables in place which was to secure them. What also helped me a lot was naming the cables by wrapping around some tape and write on it which button it is. You wanna do that because at the end there are hanging about 15 cables from the Wiimote. It's also helpful to make the cables longer than you can see on my fotos, because of the wiring, which comes later.

Oh, and what you definitively want to do is checking the soldering spots with your Voltmeter. I had a lot of fun taking everything apart because there were some cables not good soldered!!!

Step 3: Push the Button

Picture of Push the Button

Now it's time to build "external" cases for all the buttons. The easiest way is to get small buttons from radio shack (or where ever you buy them in the USA), get a small board, put them under the Wii housing, fix them and then start soldering. There are a few pictures which may explain better what I'm talking about.
My decision was to use the control cross on the left side, where the fire-select switch was, the +, - and home buttons should sit on top of the wii and the connect button should go inside the mag bay. Because the B button will be connected to the old trigger button there's no need to build things for it.

We will talk about the A button later.

Step 4: Working on the Hardware

Picture of Working on the Hardware

Because the MP5 case wasn't made for the use with a Wiimote some modding had to be done.
I started with sawing away all the rest of the flashlight in the foregripp. Then I looked for the best place for the Wiimote board to bee. Of course somewhere in the foregrip. Down there are some pictures showing where I decided would be the best place. Some inner plastic parts had to be milled away with my Dremel. Again: be careful! It's easy to take the material away but filling holes always looks cheap.
When you're done with this and the wiimote fits in the foregripp think about a way where all the cables can go into the body. I wanted to use pin-connectors, but I seemed to be to complicated so I milled a part in the MP5 body away and some plastic on the foregripp.
The battery case in the grip needed to be changed from 3 cells to 2 I put the connect button

Step 5: Talking About the Wiiboard and Space

Picture of Talking About the Wiiboard and Space

The most difficult and trickiest part is getting the Wiimoteboard in the foregripp. I had to remove some of the plastic on the lower side of the foregripp for the nunchuck connector and the capacitor.
First I wanted to desolder the IR-cam but first the solder they used seems to need ultra high heat and I didn't want to destroy the camera! Because the MP5 body had a battery case I cut away the battery clamps on the board.
After the board and all cables fitted in the foregripp there was still some space which I think is good for the A button to go there.
A bit of the board comes out on the front side. I used the lower front side of the Wiimote body, modifies the upper back side to fit on the front and hot glued it on the board.

Step 6: Wiring on the Right Hand Side

Picture of Wiring on the Right Hand Side

The easiest way to avoid cable chaos is to use connectors. I used them to connect one side of the body with the other. Because I milled already on the left side some plastic for the cables from the foregripp to the MP5 body away I used some heat shrink tube on the right hand side of the MP5 body and hotglued the cables to it. on the backend part of the body I used the male connectors and on the other side the females. Because there was a little plastic pin on both sides of the body it was easy to fix them in the right place. On the other body half I connected all the buttons with the cables coming from the Wiimote board. Except the battery cables! I decided to make it easier when adding a charger in later projects I will need them!

Step 7: Re-assembling

Picture of Re-assembling

This is the last step:
Fix all loose cables inside the body with heat shrink tube and hot glue!
Re-assemble the MP5 body. The best is to start with the connectors, have an eye on the cables inside the body, clip it together until you are at the muzzle and then screw the screws in. Be careful that there are no soldering points on the board in the foregripp get broken.
Then close the foregripp.

Now go to a game dealer you trust, buy The House of the Dead and have fun.

Goodbye Wii Zapper, Welcome WeeP5

The next project is to mount an 2x16 LCD in the MP5 body to provide turobo triggering for each button in choicable times!

If you need help, please feel free to write it in the comments. I'll answer if I know the answer =)


John_234 (author)2010-01-24

What I think would be really cool, is putting some of the wiimote controls into a the nunchuk or similar off hand device, and putting the main buttons and motion sensors into an EBB pistol, in effect, creating a lightgun somewhat like the Time Crisis games.

I'd say the trigger would be the B button, and the "safety" trigger the A button. You could probably stick the motion sensor into a laser sight, too.

Trace II (author)John_2342010-02-06

What if a someone put a wiimote inside a tube that looks like a silencer, with the b button wired to a pressure sensor that can pick up when the airsoft gun it is attached to is fired, that way, you could use any airsoft gun without any modification.

mchau2 (author)Trace II2015-12-24

the silencer idea is brillant! more shooter game on ps4 and xbox though... nextgen!

ZipperedSpartan (author)2012-11-22

can I ask a few questions
Does the sight work?
And is possible to make a nunchuck holder?
Thanks :-)

barakmaoz (author)2009-05-23

man! but you don't construction because you broke a air gun and do what ever!! what did you wont it's will be?!?!...

bounty1012 (author)barakmaoz2010-11-24

Its a cheap $5 flea market gun.

redsuit09 (author)barakmaoz2009-08-09

its not an air gun.... just a cheap plastic toy one from a dollar store or something

omnibot (author)barakmaoz2009-07-13


airsoftbeast40 (author)2010-01-09

nice instructable but wouldnt it of been way easier to just tape a wii remote to the side

0000hawk (author)airsoftbeast402010-03-18

 but this looks way cooler

THeOReos (author)airsoftbeast402010-01-09

Sure it would have been easier but also much more ugly and surely more improvable.
Check out The shop yet only is in german, but feel free to send me mails with questions =) (all manuals are allready translated and hopefuly the shopsoftware too! :D )

wijomas (author)2008-12-26

Nice job! :) Might have to try this with one of my broken airsoft M16's ;)

Bazzatron (author)wijomas2009-05-06

i was thinking exactly the same thing just went to get my airsoft mp5 out and saw it just laying there.... we have to make them all and have an epic ghost squad tournament lol

objection! (author)Bazzatron2009-05-18

*Really Deep Voice* GHOST SQUAD *Normal Voice* Wish I could get even a toy MP5 in Australia - they are ludicrously strict on anything that looks like a gun (EXCEPTION: NERF. I walked down the street with a painted black nerf gun with no orange tip, cops drove past, looked, didn't care. Weird.) Nice 'ible, though. Love to do this, but see above.

Bazzatron (author)objection!2009-05-19

Ive noticed that alot of things i like are illegal banned or frowned upon im aus lol, Is it true that is blocked? If you can get that far try to navigate to the random board, pretty sure thats banned lol - dont know what i wud do with my spare time if i couldnt play with guns, swords or lurk on 4chan WARNING - 4CHAN IS NOT FOR THE FAINT HEARTED - THERES A REASON FOR IT BEING BANNED IN SOME PLACES!!!

DeathToSquishy (author)2009-05-06

That is totally amazing. It's the first mod I've seen where someone put their Wiimote parts inside a gun. You should post it on WiiArmory! It would be perfect to use with The Conduit, as the MP5 is one of the main guns.

daywalker42 (author)2009-01-07

warranty?? pshaw. I laugh in its direction as I destroy the remote...MUAHAHAHAHA

pembo210 (author)daywalker422009-02-03

HAHA! so tru! I've gone thru several controllers over the years with various projects. Cool mod.

wleewillard (author)2009-01-31

Ok. So I got distracted with a bunch of work, but I am back to building my gun. I have a problem. The B Button on the bottom has 4 plates, I soldered 2 to one wire - and the other two to one wire, but the button is showing always put down. What do you think the problem is? Could you please send a picture of what that looks like? thanks so much

adambehman (author)2009-01-31

This is awesome. I've been working on a similar project, but with the Nyko wii zapper. can i reference some of your findings? did you look into posiply communicating to the wiimote external as a peripheral (like w/ an Arduino microcontroller)? very cool instructable

longhornsb25 (author)2009-01-05

how much?

999592 (author)longhornsb252009-01-09

well i would assume the price of the wiimote, the toy gun and the wires (if you don't have them lying around would come to a little less than a hundred dollars

longhornsb25 (author)9995922009-01-09

i meant to buy from the creator

999592 (author)longhornsb252009-01-12

AAAh well that all depends on the current supply and demand then you factor in basic meteoroligical stuff and that could take hours to figure out.

rommel_uk (author)2009-01-09

ever thought of setting up a new business selling these things ? i have a wii and wouls love 1 ,good work by the way

mr.mp5 (author)2009-01-09

uhh doese the bolt move and also does the mag come out

longhornsb25 (author)2009-01-05

how do u add the b button like how to solder to it

mr.mp5 (author)2009-01-03

where did u get the mp5

THeOReos (author)mr.mp52009-01-03

I bought it on a german online auction site like ebay. TjT commented that "if you go to they have an entire broken guns section. check that out. also, hosts some guns that are cheap, but if you just want a quick mod, go to and look under their discount/budget airsoft. Just a few ideas..."

mr.mp5 (author)THeOReos2009-01-05

also does the bolt move and does the mag come out

mr.mp5 (author)THeOReos2009-01-05

umm im in canada so is it airsoft

mightywombat (author)2009-01-04

I think I would have tried to engineer a way of mounting a Wiimote in the foregrip of the MP5 rather than cutting it up and gluing it in different places. You could figure out a way to interface the buttons of the gun using the port on the bottom of the remote. I guess I'm just reluctant to dissect my Wiimote...

noremakk (author)mightywombat2009-01-05

One way that would have been a bit cleaner (although you would still have to dissect the wii remote) would be to simply take the parts from the inside of the wii remote and mount them to your own (darker-coloured) buttons. Lengthen some wires here, solder some more there, and you have an even more professional look.

wleewillard (author)2008-12-30

I think it would be very helpful if you could give detailed instructions on how you replicate the "new" buttons on the p5. Right now I am just really confused what kind of parts you are using, how you are connecting the wires to the new buttons etc.. Someone like myself, who understands a general amount of wiring, may still be completely confused on how the heck you wire the new buttons. Cause I know I am :-) I went out and bought some buttons from an electronics store. There are 3 metal connectors on them, and another only has 2. Can you walk us through how the heck you transfer the signal from the original wiimote to them?

THeOReos (author)wleewillard2008-12-31

There are different types of buttons. The ones I used are pushbuttons. That means that the circuit is closed as long as you keep your finger on it (I think they are called pushbuttons) LIKE THIS ONE. So there is one side with pins where the source voltage goes and the other one, which will have voltage on it as soon as you push the button. This side (the output side) goes to the wii board.
Ill add a picture a little more detailed like in step 2 to show you on the 2nd or 3d of January

wleewillard (author)THeOReos2008-12-31

What is the name of the item that you run the voltage source wire to? Let me make sure I understand this? 1. I solder a wire to each to the gold plate on the wii mote "transit signal" 2. solder a single wire to any voltage point on the wii mote 3. run the voltage wire to some sort of splitter that will allow me to run multiple wires so each new button will have a voltage point 4. then attach all the buttons to the gun, run the wire from each gold plate wire that I created on step 1, and attach these to one of the button prongs, 5. Then run a wire from the splitter hooked to the "voltage wire" and run multiple wires from this splitter to each 2nd prong on every button Is that all correct? I can't fit the entire wiimote circuit board into the gun, could you show with a picture what parts of the wiimote board can be cutup to solve the size issue.

THeOReos (author)wleewillard2009-01-03

That's exaclty what you need to do (may I copy your text into the instructable?) The name of the item where I run the voltage wire to is the "splitter" if you want to and then to the pushbuttons in the mp5 body. I wouldn't cut on the wiimote, I think it's better to cut plastic away from the mp5.

wleewillard (author)THeOReos2009-01-03

do you have a personal email I can send something to?

wleewillard (author)THeOReos2009-01-03

You took the buttons covers from the existing wiimote and used them on the gun. For instance the directional pad. Could you please show pictures of what those look like? How you are replicating the same connectoin? what are you suing and what you use to replicate the connection that was used on the original wiimote

wleewillard (author)THeOReos2009-01-03

Yes please do. Do you know where I can find good instructions for the multi-meter? DId you just use some sort of wire wrap splitter? Where did you order all your buttons from? it might be very helpful to include a list of needed items, and where to find them

PYROID_ROBOT (author)2009-01-01

hey mate did you think about puting some insulation over that capacitor? from what i see thats where your hand goes and i could give you quite a zap. good work anyhow. send this instructable to nintendo and tell them to suck d***

gormly (author)PYROID_ROBOT2009-01-03

I don't think I have ever viewed an instructable involving electronics where someone didn't add their 2 cents in on some supposed safety issue.

Honestly, if you look closely and you know anything about electronics at all, no matter what happens you will not get "quite a zap" from this design.

No offense meant to you because you are *probably* being helpful, but there is no need to scare anyone about this, it is quite safe.

THeOReos (author)PYROID_ROBOT2009-01-03

I thought about it but man, you would need either the smallest fingers in the world or wishy-washy skin to get in contact with them =)

bounty1012 (author)2008-12-28

Something that would be cool to add is something that will vibrate the back end to make a recoil effect.

You might be able to use a transistor to fire a weighted solenoid when the trigger is pressed for the recoil. It might steal voltage from the wiimote though, but you could always do a totally separate system using two buttons. Let me know if you try it out.

THeOReos (author)SmithDrewSmith2009-01-03

I will tell you when I try it out! =)

THeOReos (author)bounty10122008-12-29

I already thought about it but there are a few problems with it, one is that the recoil effect should somehow by synchronized with the game, so that when you reload in the game there should only be a "click" feeling in the weep5 and I think I'm not able to get this technique in the mp5 body =)

volki (author)2009-01-02

I wish i had a wii now

longhornsb25 (author)2008-12-31

u should have spray painted or air brushed the white areas from thw wii remote

benfoxg (author)2008-12-31

does it still make gun noises when you fire it? lol that would make it even more cool! p.s. 5 stars

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