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How to Install the LaserEx Internal Laser Into an FN PS90

The aid of a laser pointing device on a pistol or rifle allows much greater accuracy and precision in striking the target. Once these types of devices were only available to law enforcement agencies, but today they are purchasable by anyone with the money and desire. Most can be installed by the owner straight from the box, but some like the FN PS90 require installation by a skilled gunsmith.

Instructions

- 1
  Perform a field strip of the weapon. Continue stripping the stock of the weapon by removing the cross bolts and notice the small slots that are for the wires of the laser.
- 2
  Take the front laser cap and check its position on the front of the stock. Mark the caps position. Drill a hole on the seam for the placement of the laser hood. Begin with a very small drill and slowly progress upward in diameter until the hood just fits through the hole.
- 3
  Insert the laser hood and hold it in position by using folded newspaper. Reassemble the stock. Press the laser cap onto the lens hood and mark where the three mounting screws are situated. These mounting screws are inside the stock and screw directly into the laser.
- 4
  Place the laser into the stock after opening it again. Choose the position for the power selector. Mark the position and reassemble the stock. Drill another hole at the seam, increasing in size as you did previously. Slowly work your way up in diameter. Be especially careful not to position this hole too high on the stock, as it will block the slide. Do not position it above the top edge of the stock.
- 5
  Mark the battery casing and laser actuator button. Reassemble the stock and carefully drill the remaining holes. Strip the stock down again and insert the laser components. Reassemble the stock and reassemble the weapon. Test the laser sight and perform a test shot to check alignment.

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