P90 Integral Laser project
 

The real-deal “Laserex” version is very rare in airsoft circles. Too pricy and requires you to crack your precious P90 body in half for installation. Not so with this homemade version which yielded excellent results for a fraction of the cost. Installation is straight forward if you have some experience building models and can solder a couple of wires together.

The laser came from a small dollar store toy pistol. This was one import toy not really suitable for kids. The pistol had no orange tip, and the laser is incredibly bright, perfect for junior to blind other children or family pets… When the toy’s cheap plastic trigger broke I saw my opportunity to rape it for parts. The laser unit itself is incased in a small copper cylinder about one cm long. The business end has a small window, and the other end has two small wires to power it. It runs on three watch batteries. I chose to mount the battery compartment so the upper receiver normally hides it.

The laser is mounted in a plate cut to the same profile as the end of the P90 (just below the flash-hider). Although the real-steal version may be metal, I chose to use black plastic from an old drill gun battery case because it’s similar to the material the P90 body is made from and you can use solvent glue on it. I used the same material to make a yoke for the back of the laser to sit in. Three screws feed in through the plate to support the yoke, and springs allow the yoke to float so that fine adjusted to aim can be made after installation.

Plate & yoke
http://www3.sympatico.ca/aftershock/assembly_parts.JPG

Plate & yoke laser assembly
http://www3.sympatico.ca/aftershock/laser_assembly.JPG

It’s a simple matter to remover the trigger assembly from the P90 lower receiver. This gives you access to the inside area where the push button is mounted. With tweezers one can slide the wires underneath the trigger seat into the front body section. The push button was acquired at the local Radio Shack/Source for 4 bucks and is installed with a small rubber o-ring to help match the curve of the P90 body. I positioned it so you can hold the P90 comfortably whether your finger rests across the button or not.

After a few evenings work and a careful set-up the result is pretty sweet and I can’t wait for my next CQB engagement...

http://www3.sympatico.ca/aftershock/p90laserpic.JPG

(I can post more pics of the project in progress if there is interest... I don't want the mods to shoot me.)

Nice work. You got skills.
Be carefull not to shine it in people eyes.

Very nice and clean, I'd love to see more pictures.

As would I. It's kinda hard so far to follow those instructions @_@.

Yes, pictures speak a thousand words... I can provide advice for anyone installing something like this themselves. PM me or post with specific questions.

Good point. Laser-sighting devices are dangerous to human eyes. You must use them with caution and not flash a laser sight into someone's eyes. Although we have not had any serious issues, I would not blame a game host for ejecting someone reported to be misusing a laser. Respect your fellow airsofters!

Damn, I'm going to try that if you don't mind. Great work Guardian.

The dollar store sells toy pistols with lasers? I'll have to look for one or else just strip one out of a cheap laser pointer.

Can you expand on how you built the battery holder mechanism?

Thanks
The toy laser pistol, engraved as “Lazir”, was the best laser light for the money.

The battery holder is just a small plastic box deep enough to accommodate three watch batteries. The batteries are forced against contacts by a spring like any typical battery holder. I didn’t care for the look of the holder which came with the toy pistol, so I scratched up a new one in black plastic… but you could just use the one that comes with the toy. I robbed the contacts and spring (with the wires already attached) from a scrap AA battery holder. I took a pic before installing it but it’s kind of blurry.

one word

Sweeet

I have one question, is it acurate?

Not sure what you mean… Of course it’s accurate because you adjust the laser so it’s parallel with the barrel. It is similar to using the RDS except you don’t have to look through it. Laser is primarily for CQB so you don’t need to adjust for the wind.

Better question...HOW MUCH TO HAVE GUARDIAN DO IT TO YOUR P90 :)

damn capslock
no not yelling.

so Guardian how mucho? :D

Ditto.

Guardian what do you say about a group buy for your install?!

I would SO be in for that. Pimp my ride!

I’m actually working on some other projects right now... I could turn into a regular “Q”
I’ll keep my eyes open for more parts and keep you in mind.

Amazing! I've always wanted to do that to my P90's but I was always lacking in parts and tools.

Is it adjustable for windage and elevation?

You adjust it with the 3 screws on the front.

Are those scale plans that you have taken the phots of the parts on? I would like to gat a copy of them for sure. Can you email me a copy? I've already got a laser, screws and some plastic. I'm almost good to go. :)

Scans of the blueprints would make you my hero :-D

I am planning something similar, cept I want a Surefire in there. I can't figure out where to put the batteries though. On the Laserex model they route power all the way back to the back grip, and thats the part that requires the shell spliting.

Is there enough room to fit two flashlight batteries in space you open up? A single solid unit for the both bulb and batteries to mount in would be ideal, but I'm not sure whether thats possible heightwise.

My sketch was done to scale so that I could plan out the position of laser assembly and battery housing. I can scan it.
http://www3.sympatico.ca/aftershock/p90lasersketch.JPG
I doubt there is room for larger batteries up front unless you permanently installed rechargeable and only had the connector showing at the surface. There is a wide carriage connected to the trigger assembly which slides forward into that space. You can’t install anything which will interfere with that. Examine the gun diagrams and you will see what I mean.
Another alternative I just thought of would be to route the wires to the main battery at the back and tap in. You might need to check that the lightbulb is appropriate for the voltage you will get from an AEG battery...i.e. might need 9v instead of 6v. Do a test first to see if current draw will dim the thing everytime you pull the trigger.