How to Remove the FN PS90 Flash Hider and Barrel

Step-by-Step Guide

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   Step 1: Unload the PS90.

   Drill all the way through the flash hider. ,,, (See the Tips section regarding wrenches.) ,,, This procedure will release the captive springs and will make reassembly more difficult.
   
   Use a dowel rod (or old P90/PS90 barrel) to push the old barrel out (front to back).
   
   This procedure will retain the captive springs and will make reassembly more simple.
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   Step 2: Verify that the PS90 is unloaded.

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   Step 3: Disassemble (field strip) the PS90.

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   Step 4: Secure the barreled receiver in a drill press.

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   Step 5: Use a #43 carbide bit to drill out the blind pin.

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   Step 6: It should look like this when you're done:

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   Step 7: Using barrel blocks

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   Step 8: clamp the barrel into a vise.

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   Step 9: Slip a slimmed-down 15mm wrench onto the chamber end of the barrel.

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    Step 10: The barrel/flash hider interface is left hand thread

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    Step 11: so turn the wrench clockwise to break them free of each other.

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    Step 12: The hider/sleeve is now loose from the barrel and it can be slid off.

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    Step 13: See the Tips section regarding the three springs that are used in conjunction with the barrel before deciding which of the following two steps to take: Simply slide the old barrel out of the rear of the receiver.

Detailed Guide

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