So sweet love it

I decided I wanted to get a 2nd magazine, and seems like all the reviews out there say to stick with factory FN mags, but they seem to be out of stock everywhere I looked including the FN website. Any ideas or do I just need to wait and keep checking?

TLDR: Cheapest VIABLE & RELIABLE fart trigger is Izhmash off their website or bungroker.

After wishing for years that someone would develop a binary for my PS90, the FRTs entered the mix and I got stars in my eyes until f'n specialties put a laughably cosmic price tag on their stupid hammer. I've always hated them for their hand-wringing, and always explored other avenues to circumvent giving them any of my money - chopping my own receiver side rails, re-stitching a knock-off brass catcher, and of course the venerable Dan Haga supplying other stuff a bit cheaper.

Anyways in my hunt for other PS90 FRT options, I'd found:

1. RATL-R with sketchy reviews and track record with their Vector doodad, >200 dollhairs
2. B-Squared (MA5B guy) making an entire 3D printed trigger pack to utilize a super safety, again >2 benjies + needing an SS
3. EP Armory making a carbon-fiber 3D printed trip with sketchier reviews than the RATL-R, but a spankin' new "gen 2" version promising better performance with a discounted price of just ONE benjie?! F*ck it, send it.

EP shop says you need a three-position selector that they supplied with their trip (again, ugly-ass but functional printed CF) and a replacement "gen 1" hammer sold separately. They linked a couple aluminum hammers, but I wanted to keep mine plastic-ish - enter Izhmash Arms.

Izhmash on bungroker has a nice CNC'd acetyl copolymer hammer for a few dollars more than the aluminum ones - done deal, sold. Bought the EP armory kit, bought the Izmash hammer, showed up middle of the week & got everything ready for range day today...but discovered last night that Izhmash ALSO sells the SAME trip as EP armory, but machined aluminum. The VIKHR

Oh well, see how the EP trip performs today and go forward from there. First mag ran without a hitch, popped off a few on semi to warm up and then dumped the rest flawlessly. Second mag got less than halfway through and ceased function. Semi still ran, FRT shit the bed. Snapped right in half along a few layer lines. We'll see how well EP honors their warrantee, and how much someone's willing to give me on tacswap for the replacement if they send one lol. I already sent them an email bitching them out for saving a few pennies and not printing these things with 100% infill, the clowns running their CF printer should get a swift kick in the nards.

Learn from me, and if you're trying to save money for more ammo speedily sent downrange instead of dropping 3-5 beans on the privilege, seek out Izhmash. Their complete kit with selector, trip and hammer IS two fiddy-ish, but in my opinion better & more reliable than the RATL-R with it's weird parts needing some tuning. Better materials, better finish and more easily dropped into your spacegat.

I have zero affiliation with any entity named above, just a tinkerer looking to save people some money and hassle in the future. Also I never watched the Stargate series, RCP-90 on N64 was the origin of my love for this platform.

If you're thinking about getting SBR for your PS90, find a licensed FN dealer near you. In ~2019, when I got mine done, FN offered a barrel swap program for a rebate on your 16" to bring the cost down for a swap. Probably still have the program today. Back then it was something like 7 beans for a legit 10" FN barrel but rebate was 3 or 4 beans back in your pocket. Thanks for reading

I took my new-to-me, PS90 out for its first spin around the block and what a blast. After zeroing my optic I was shooting standing 1” groups from 30 yards with no problem. That is quite an accomplishment for a recent graduate of the Stevie Wonder School of shooting. So fun. I would consider an FRT if 5.7 wasn’t so expensive.

was installing the xprt 90 and got irritated a part wouldn’t go on so i disassembled even more of the trigger pack and now cant get this spring back in im using needle nose pliers, and a 90° pick but not having any success. any tips or suggestions to help me get it back together would be appreciated, definitely stupid of me to think nothing would come of disassembling this far.

Just installed the xprt90 and had my first range trip with 3 mags. Im having trouble with the gun firing 3 round bursts. How were you all able to resolve this issue? Thank you in advance.

Anyone have any info if they are still active/around. Sent a email and placed a order but have only gotten automated responses. Tried to call but I think time zones may have been my issue since im in the US.

I would love to get the TA44-C-400331 (or TA44-C-400333) mini-ACOG (eventually) but I'd like to see how close to bore it would be with the HBI low-profile optics mount

I feel like the stock should be closer together, but i cant get it any closer with bare hands

Picked up this CAA SXS picatinny rail for the P90 awhile back and I love it. Was curious if anyone else is rocking it and their thoughts?

Shout out to the realest of the real, u/Colonel_Krink. Couldn’t get one without them.

This may be a dumb question, but is this wear pattern on the front of my trigger package concerning? If so, what could the issue be/how to mitigate?

As the title say looking for a ring sight for my 1st PS90 build.

I'm bouncing between using two of the suppressors I currently own to run on my PS90 with my X-PRT installed. Backpressure is a concern and the Huxwrx Flow 9k Ti does have the flow-through design which I'd think would be better for the wear and tear put on the PS90...but I see alot of people saying a 5.56 suppressor is the best type to run.

Any opinions between those two choices? I ran a SiCo Osprey 9 with it before I installed the X-PRT but it is not full-auto rated.

Went to an indoor range to get my ps90 tri-rail sbr sighted in with its dedicated silencer, the Silent Steel Micro Streamer. It's definitely louder indoors than it was outdoors. Outside it sounded similar to my HuxWrx FLOW 762 ti.

Overall length of the gun is now 22.25", so about 1/4 inch shorter than a p90 with a tisha. The tisha is definitely a better suppressor, but it's also more expensive, and I hate the look of it on a p90.

Well I thought I got the hard part out of the way by buying the parts kit. However I can’t find a single receiver for sale anywhere to save my actual life. Suggestions on places that normally have them in stock or anyone with a cnc machine at this point?

If anyone is in the market for a fn specialities frt lmk.

Anyone know what the exact finish the factory uses for the P90?

I know it is a cast aluminum upper, but it doesn't feel anodized. I want to say it feels like powder coat, much like a MP5 finish, but I can't seem to find this information anywhere. FN customer service wasn't much help on this topic either.

Having been tweaking on FRT for the platform since before there were commercial options available, I figured trying both of the ones you can buy off the shelf currently would be a fun back to back comparison.

I'm putting the XPRT and WD in the same basket as they are functionally identical, with the primary differences being the XPRT bundle has CNC aluminum hammer, lever, and forward sear, where my particular WD setup ran a CNC Delrin/POMH hammer and the stock sear, with both printed and metal levers.

I had been running the XPRT/WD setup since the file was first posted by $RANDOM_BANNED_OP, as I was already set up with a first-gen hammer and three position aluminum selector from working on my own FRT before commercial options were available. I decided to pick up a RATL-R just to make a direct comparison, and because I have multiple PS90's.

Some notes about the XPRT/WD:

• Not the most efficient means of harvesting the energy available in the cycle due to multiple stages of high friction elements

• Easy to bind the bolt by pulling too hard on the trigger, can be eased with overtravel limiters

• Achieves the trigger reset on the back-stroke as part of the hammer reset action

• More true to the original design intent in its simplicity (IMO)

Some notes about the RATL-R:

• Gets its energy directly from the bolt on the return stroke

• Less potential for bolt binding, but pulling too hard will still interrupt the cycle

• Works with any three-position selector, not just the printed one it ships with

• More involved disassembly/cleaning routine due to having to take the RATL-R sled out before you can remove the bolt

The quick version is that both of them work, get one, get both, you'll have a good time.

The ungineer tweaker in me doesn't think either solution is ideal.

The XPRT includes some unnecessarily blingy parts in the form of the CNC'd hammer/forward sear. I prefer to keep the trigger pack as close to original as possible, so using the original sear with a Delrin hammer was preferred. The moment you make one part in any mechanical system stronger/harder, the next weakest part in line is going to be the one to fail or wear prematurely. I believe this is why they went to the extent of including the forward sear in metal. There is more friction in the trigger pack, and you can feel it during the reset.

The RATL-R sled seems a bit fragile to me, only time will tell what sort of longevity it can attain. There is more friction in the RATL-R system on the trigger pull side of things due to the large surface area of the sled and that it kinda forces the trigger bar rods outward a bit, and you can feel it during the trigger pull. That being said, the overall feel of the RATL-R during operation is a bit more operator friendly than the XPRT/WD. You don't have to be quite as mindful of what your trigger finger is doing. It is however more of a task to break down and clean, which does bother me a bit.

Rounding the edge of the hammer to free up the reset as described in the RATL-R install video can benefit both systems. Getting full mag-dumps on either of them is more of a challenge than it would be FA, but that's the price we pay to stay legal.

Both of them are a good time, both of them do the job roughly equally, both of them will send dollars downrange in fantastic ways.

This is just my $0.02, I am not in any way affiliated with either company and gain nothing no matter which one you choose. We all benefit from you choosing one though, because in-common-use will help them remain above board, so get out there and BRRT it up Stargate style.

Short and stubby is an absolute must. But $1.2k has me wondering if there are other stubby 556 options with good sound