FN PS90

One of the guns I've had an interest in for several years is the FN PS90. This is the semiauto-only civilian version of the P90 submachine gun/personal defense weapon that FN created for NATO use back in 1989 - 90. 

Last summer I picked up a PSA Rock 5.7 so I already had some experience with the 5.7x28 cartridge. 

A couple weeks ago I turned the proceeds of consigning three guns into a PS90. I added a Primary Arms SLx Advanced Push Button Micro Red Dot Sight - Gen II red dot sight, along with a sling from Urban ERT. The PS90 came with a single 50 round magazine so I bought three more from Grabagun.com, who had the lowest price on them.

One final accessory that I highly recommend is a spent cartridge collector AKA brass catcher. FN offers one but the price is ridiculous. Instead, I got one from jemachinetech.us that works well. It is large enough to hold 50 spent cases.

My initial impressions are as follows:

• The gun is totally ambidextrous. The charging handles and magazine catch are symmetrical and easily operated with either hand. There is no last round bolt hold-open. Spent cartridges eject out the bottom of the gun.
• It's very small but heavier than you think it would be. Since it's a straight blowback design the bolt is heavy.
• Even though it's fitted with a 16" barrel to prevent it from classed a short barreled rifle under the National Firearms Act, it's very compact. If you filed a Form 1 and SBRed it, it would be about the same length as a computer keyboard.
• The length of pull is a bit short. Since I'm short this isn't a problem for me but if you're tall it might be. I think there are extended butt pads available.
• Takedown for field stripping is stupid simple. The mechanism appears to be quite simple.
• The magazine design is genius.
• The trigger pull sucks. It's heavy and spongy. OK in a combat gun and the risk of an inadvertent discharge is low but it would be nicer to shoot if it was several pounds lighter.
• I like the horizontal rocker safety.
• The charging handles don't provide a lot of purchase. I may install an extended handle at least on the right side.

Today I put 190 rounds through the PS90:

• 100 x FN SS197SR 40 grain Hornady VMAX (made by Fiocchi USA)
• 40 x Fiocchi Range Dymanics 40 grain FMJ
• 50 x AAC 40 grain FMJ

The AAC ammunition felt very consistent. In contrast, the ammo made Fiocchi had a few rounds which felt like they were loaded a bit light.

The SS197SR and FRD ammo gave me a few malfunctions where the bolt didn't seem to reciprocate far enough back to recock the hammer and strip a new round into the chamber. However, they may have been related to my #2 magazine so I'll keep an eye on that one.

The PS90 performed perfectly with the AAC ammo.

Recoil was a little more than I expected though not by any means unpleasant. This is due to the heavy mass of the reciprocating parts.

The Primary Arms red dot sight is a good fit for the PS90 (or any other close-in gun, for that matter). The 2MOA dot is large enough to see easily but small enough to be precise. Even with my astigmatism the dot was defined enough to use, albeit not perfectly sharp.

I got it zeroed easily so that point of aim = point of impact at 50 yards. Due to the high sight line over the bore, I plan to shoot the gun at both closer and longer distances to see how POI is affected. E.g., I'm expecting it to shoot low at close range.

After zeroing the rifle I spent some time banging gongs at 50 yards. Two of these are about 8" wide while one is about 12" wide x 18" high, and there's also a 12" - 16" plate. Finally, there's an old bowling pin hanging in the bunker setup to catch splatter from the steel plates.

From the bench it grouped into about 1.5" to 2" at 50 yards.

It's very easy with the PS90 to hit the small plates doing drills from low ready, either single shots or double taps.

Especially from the PS90's longer barrel, the 5.7x28's ballistics should make it suitable for close range self defense. It's an easy gun to quickly get hits on face-sized targets out to 50 yards at least. Recoil is very mild and the noise and blast are much less than 5.56 NATO. It's not a replacement for an AR15 or AK. It's not an infantry rifle. It's a PDW.

I could see where a PS90 would be useful on a farm or ranch as a tractor gun to take care of varmints up to the size of coyote or even a bit bigger. It's super compact and carries a lot of rounds on board.