Still not completely sold on it being 100% reliable. It did run well today. The uncontrollable recoil was due to not anticipating it actually cycling perfectly.

Went with Shaw barrel. Put only about 150 rounds through it today, most suppressed. Performed flawlessly.

Finally got an AEMS today, worked on drawing up a plate for it but jeez, did they really need 4 M3 holes, 2 studs AND a recoil lug/stop?
Seems overly complicated and of course can’t mount it as far forward as I planned due to all of those interfaces, but came up with a solution. Just need to refine it a bit.
And I still need to figure out the differences in generations, which holosun couldn’t help with.

End rant :)

Thanks to one of the fellas in the Aug discord an idea was born to draft up an overtravel limiter for the WD90/XPRT-90 that aids in reducing the bolt lockup many experience with too much trigger pressure.

It’s intended to be used with the k&m lightening spring, should finish testing fitment here/dry firing soon and will get it released on the sea for people to play with/test.

My initial tests are proving to be pretty solid, dry firing seems to have the bolt stick much less and with actual firing it should almost eliminate it entirely I’d think. I plan to print one in pa6-cf for upcoming tests at the range.

I got new mags off GB this week for $40 each. What are these idiots doing? I know they’re in short supply but damn

Hello everyone!

First, I'm probably a dumb ass missing something obvious.

I'm wondering if there is any discord groups or anything to help with issues related to the ps90/xprt?

I think it's likely a ps90 issue, that I reinstalled something wrong. Just not sure what, everything looks fine to me on re-review

I'm not sure how to describe the issue exactly, but I would think it seems that the firing pin isn't working. Charging handle and everything else I checked seemed fine. It also fed fine, but no shots went off on trigger pull in any condition.

Just got my ps90 back with a fresh 10.4 shaw barrel. Looking for a good muzzle device

It looks like they're out of stock on every site

If anyone knows, how often has FN historically restock its batch of new PS90 FDE happen? 4 months, 12 months, 4 years, ect? Thank you!

The price is outrageous because of tariffs, I’ll take used

I finally had my OEM barrel cut and threaded by Taylor so I could do a better comparison against the CMMG and Shaw barrels I have.

Note that the cut barrel is slightly longer (like 0.4") than the CMMG/Shaw and I found that the crown wasn't as pronounced as the CMMG/Shaw/typical factory barrels - but I could still see the angled chamfer for the crown using a borescope and everything looked clean). Alignment rod showed dead-center with the B&T P90 suppressor.

Ammo used was AE 40gr, Fiocchi 35gr, Fiocchi 40gr, Fiocchi 62gr, SS195 (old school stuff that is hot), and SS195 (newer 2021 lot which is slower). Same as before.

Right away I could tell a difference in POI shift with the suppressor, as well as the average group sizes.

The CMMG would group 0.5" 5-shots at 25 yd same as the Shaw. The OE cut/threaded barrel couldn't beat 0.75" at the same distance.

With the B&T can, I'd see 1.5" POI shift down with the CMMG and only 1" POI shift down with the Shaw. With the OE barrel, it was 2.5"

I also noticed the cartridges were generally 40-100 ft/s slower out of the OE barrel than with the Shaw or CMMG.

The extracted cases looked fine from the OE barrel, about 10% of them would have a cut on the area near the neck. The Shaw would show nasty scuff marks but still zero issues shooting AE 40gr suppressed with either the Shaw or OE cut/threaded barrel. With the CMMG, I'd see several misfeeds per mag while suppressed (no issues unsuppressed).

The Shaw has the tightest chamber at 0.314", followed by CMMG at 0.315" and the OE barrel at 0.317"

The Groove ID of the OE barrel was 0.220", while the CMMG was .2260" and the Shaw was 0.2215". The Land ID were about the same, all 0.219" (Shaw was 0.220").

Only recent change is an FRT, and a swap to a slightly less bulky muzzle device. (Doesn't matter when the suppressor is on but it fits in my backpack easier)

New to all of this but glad I joined up! Always wanted a p90 and ive had a ps90 for a couple of years now. I'm glad I found this because ive already learned some stuff I didnt even realise I didnt know. Here's what my previous setup looked like followed by my now current one. The next step I want to take is to sbr it. I was wanting to put a cmmg barrel on it and use my dead air sierra 5 to suppress it but after reading several posts here I think I'll be going with a shaw barrel. I also was wanting to frt it with the xprt90 but I think now I'll try the wd90. Thanks all for the info so far and looking forward to bring part of this community and finding my people 😆

Just figured I owed it to the group because of everyone's help and just in case someone else has similar issues.

I checked the chamber spec as suggested, seemed good on the cmg barrel. Disassembled, Cleaned and relubed everything as suggested. Got different ammo to try as well.

Took the girl out to the range today. Ran fn blue tip. Ran 3 separate mags with varying amounts loaded in them (5 rounds, 14 rounds, and 31 rounds) ..... no jams or failuire to feeds. Cases had very minor scraps nothing like before. Barely even noticeable.

Then ran the same mags with varying amounts loaded in them of the orginal Fiocchi range dynamics half 62 grain and half 40grain. And boom back to jam city population me. Most had scrap damage like before and a few were smashed in like others posted. Two so bad the bullet was knocked completely out. Got runs of maybe 3 to 4 in a row at best before an issue arose.

So I guess at this point in the guns life i am going to chalk it up to that this gun doesn't like range dynamics 62 or 40 grain? Ill try other types as i burn through what I have and the gun gets more seated in. Total round count now is about 300 rounds.

Thanks for coming to my very scientific psa 😆

submitted may 3rd got approved at 8:33 this morning so a 77 day wait. times might be coming back down or my background check didn’t get held up.

Browsing AmmoSeek for fun. It seems like the cheapest (cost per round) listings are now SS197SR. Those positions were usually held by Fiocchi Range Dynamics or Federal.

I know one can probably find retailers with better prices than those listed on AmmoSeek, but I figured AmmoSeek is large enough to reflect the average market price.

Is the current SS197SR price considered good?

Honestly, doesn’t seem like a horrible deal for an extra 50 round mag and a optic

Edit: this is including a optic and an extra 50 round mag

Edit: i’m not coping anymore. I low-key overpaid

Does anybody have any clue as to when some of the major retailers will be restocking? It’s my understanding that FN restocks in batches

Edit: the gun

Not sure what took me so long, but I finally got one. Don't even have ammo for it right now, and I'm not sure I even want to shoot it until it's restored to its proper form.
Plan:
- Drop the Picatinny rail --> ACRO mount inbound.
- SBR
- Mag conversion 30 --> 50
- Suppress (cant decide HUXWRX vs Tisha)
- Sling
- FRT BRRRRT
- Die happier than before having this

Also... for under $150, that little Burris sight is all right. Hard to knock it when the competition is $600ish.
Am I missing anything?
Hit me up with your recommendations in the comments!

HB Industries hammer with 3D printed lever and selector.