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P90 Integral Laser project

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Old March 15th, 2006, 12:14   #1
Guardian
 
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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


Plate & yoke laser assembly


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...



(I can post more pics of the project in progress if there is interest... I don't want the mods to shoot me.)
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Last edited by Guardian; November 10th, 2007 at 18:25..
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Old March 15th, 2006, 12:19   #2
FOX_111
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Nice work. You got skills.
Be carefull not to shine it in people eyes.
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Old March 15th, 2006, 12:32   #3
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Very nice and clean, I'd love to see more pictures.
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Old March 15th, 2006, 12:51   #4
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As would I. It's kinda hard so far to follow those instructions @_@.
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Old March 15th, 2006, 15:59   #5
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Quote:
Originally Posted by Greykin
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.

Quote:
Originally Posted by FOX_111
Nice work. You got skills.
Be carefull not to shine it in people eyes.
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!
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Old March 15th, 2006, 16:54   #6
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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?
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Old March 16th, 2006, 00:02   #7
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Originally Posted by v82slo
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.
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Old March 16th, 2006, 14:53   #8
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one word

Sweeet
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Old March 16th, 2006, 15:01   #9
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I have one question, is it acurate?
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Old March 16th, 2006, 15:27   #10
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Originally Posted by FOX_111
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.
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Old March 16th, 2006, 16:13   #11
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Quote:
Originally Posted by Guardian
Quote:
Originally Posted by v82slo
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.
Better question...HOW MUCH TO HAVE GUARDIAN DO IT TO YOUR P90

damn capslock
no not yelling.

so Guardian how mucho?
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Old March 16th, 2006, 17:01   #12
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Quote:
Originally Posted by Zeonprime
so Guardian how mucho?
Ditto.

Guardian what do you say about a group buy for your install?!
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Old March 16th, 2006, 17:14   #13
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I would SO be in for that. Pimp my ride!
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Old March 17th, 2006, 07:12   #14
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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.
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Old March 17th, 2006, 23:26   #15
EN SABAH NUR
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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?
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