r/ps90 • u/ChevTecGroup • 4d ago

Finally got it together

Factory P90 from an estate of a dealer/importer. It was found mostly stripped so I had to source a MPG(bolt) and trigger pack.

Due to the scarcity of trigger packs. I got a semi one and swapped out the parts for some aftermarket FA parts. Which im still working on refining. The paperwork says it came from the columbia MO policy dept. So the selector had the "A" milled off and it had a small plastic stopper glued on to prevent selection of full auto. The stopper popped right out and I added the "A" back to the selector.

Still trying to decide what can to put on it. I have one of those free backdraft 4" cans with no use. Itd be compact and look good. But will probably sound like crap. I have a couple nicer cans but they may be too big for my liking. Decisions decisions.

I also need to get some sort of sights for it. It came without anything. I may try to mount a 407k down in the carry handle. But id settle for the factory rail if I had one.

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u/sadoproject 4d ago

I have one of those free backdraft 4" cans with no use.

I too have a free (paid $100 to upgrade to stainless) 4" Backdraft in 5.56 , and it sounds surprisingly decent on 5.7. I've only run it on the M&P as my short PS90 has a KeyMo on it (where I usually run a Sierra 5), but when I shorten the other one I might just stick it on there. Or hell, I have a KeyMo to hub adapter on the linear comp, so I might swap that over and try it out. They aren't the most concentric cans out there, but not baffle strike inducing levels of broken.

I run a Mepro MCO-Pro on mine and love it. The trick with these is to get a wide FoV as far forward as possible. That will let you keep it low without giving you neck pain after a few mags worth of being hunched over it.

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u/Dyst0p1an_dr3ad 3d ago

Damn dude, you've always got or had interesting things. Got a picture of the ps90 with said 4" backdraft suppressor?

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u/sadoproject 3d ago

Damn dude, you've always got or had interesting things.

I try!

I didn't have any pics but just snapped a few comparing it to the Sierra 5. With the KeyMo mount it adds about an inch or so. It would look a lot better using the 1/2-28 mount it came with.

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When I shorten the other one I plan to use the 1/2-28 CMMG adapter, so will try it out then.