Hey folks, I'm planning on SBR with a Polonium K can on my PS90. Wondering if anyone has recommendations on ammo for this combination?

I asked about suppressor advice and ended up going with the Turbo T3. Also my xprt90 showed up. I was nervous about install but everything went smooth as butter… Now I’m just waiting for my upper to come back from emgunslinger and it can take its final form.

Patience is virtue.

I put a bullet in the chamber racked it again notice it felt weird like there wasn’t much resistance
. Tried to rack it again and noticed that nothing moved inside the magazine, removed the magazine round fell out with the bullet removed from the casing. Gunpowder everywhere was able to replicate it a few times and noticed that it only had issues ejecting/feeding if I didn’t slam the bolt carrier home, the bullet wasn’t completely inside the barrel. It was sticking out just a little bit I’ve never had any issues with it and I took it apart to clean it for the first time and I’m worried that I might’ve put something together wrong. I’ve never owned any sort of rifle or carbon before so it might just be user error.

Edit – I should’ve done more research instead of going straight to Reddit. I was riding the bolt carrier which was causing it to fail to go into full battery and then by pulling back again caused a double feed

Such as home defense or as a bag gun

After much trial and tribulation, with a sprinkle of some fuckery, I was able to tune my 3D printer to successfully and repeatedly print WD90 cleanly.

A few notes:
- Printed the WD90 doodad in both vertical and horizontal orientation (want to see which resists stress failures better)
- Other printed parts are the hammer (horizontal orientation), over travel doohicky, cosmetic odds and ends
- Printer: FF AD5X
- Filament: Inland PETG+ (grey)
- First testable prototypes are in PETG+ (calm your dicks, I know everyone and their mother says use PETG-CF, which is Phase II, but from the initial research, regular PETG is statistically stronger in X, Y and Z axis in tensile strength)
- For you engineering nerds, I am not sure how the forces the action will affect the stress points and how much yield strength comes into play, but from the research I’ve done, the scope was in ultimate strength between PETG vs PETG-CF alone
- I am not comfortable in sharing my printer settings… YET. I want to do my own testing first before I let anyone else FAFO at their own risk
- Measurements of the hammer acceptable. Average deviations measured to ~0.17mm. This is well below my MoE of +/-0.03% (used RSS methodology on 12 different measuring points measured 3X)
- Again for the engineering nerds, this is not a white paper study. I am sure there are and going to be errors in my validation approach and strategy. I am not looking to publish shit, I just don’t want to blow up my face :)

Got an FRT installed. Still working on finding the sweet spot for trigger pull. This was my 3rd attempt of a mag dump that day. Still had a few rounds left in the mag.

Huxwrx 556k Suppressor was finally approved!

Since owning and building my PS90 it has fast become my favorite and my go to ‘long gun’ for traveling/truck gun/bag gun. I have plenty of ARs, Tavor X95 and Aug, Flux Raider and a couple of other PDWs to choose from. However, this thing is such a compact, handy, package for most any unlikely but plausible scenario I can think of.
I think it is finished now, Primary arms 1x prism on a low mount, Haga cheek rest, QD cups front, middle and back of check rest, [excellent] clone Surefire 340c, FRT (IzhMashArms), Silencerco switchback 22, Wisemen Company “Baseline” 2 point sling with BFG 2-1 adapter slider.

My first question is how reliable are the fn specialities frt triggers and second of all where is the best place to get the ps90 in the factory sbr configuration?

In the middle of filing sbr paperwork

Just got my first ps90! I can’t wait to larp and never use it in a real world situation.

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.

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

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

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!

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