FN PS90 Field Strip (SBR)

The FN Herstal P90 personal defense weapon is one of the strangest looking weapon system on the planet, so it is no wonder that it pops up in so many movies and television shows. The gun feeds from a 50 round magazine and is extremely compact. In this field strip we take down a PS90, the civilian version of the P90, to show what makes it tick!

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Alex C.

Alex is a Senior Writer for The Firearm Blog and Director of TFBTV.


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  • dannye

    The SBR must field strip differently. Why else would it be mentioned in the video title?

    • TDog

      Bragging rights over having an SBR version? ๐Ÿ˜€

      • dannye

        Bragging about paying $200 to the ATF to saw down a metal tube. ๐Ÿ™‚

        • TDog

          Oh sure… be a party pooper. ๐Ÿ˜‰

        • Broz

          $200 is about what a good lawyer would charge PER HOUR to represent your ass if you got busted for cutting the barrel WITHOUT a tax stamp…buy the stamp…it’s cheaper!!!

          • dannye

            Or you can just leave the barrel instead of paying $200 to the enemy of 2A for cosplaying privileges.

          • iksnilol

            I don’t quite follow how removing half the barrel is cosplaying.

          • BrandonAKsALot

            Pretty sure this is the prelude to one of those, “it’s not a full-auto, no AP, it’s dumb, why have it? My life is sad” sort of things.

          • dannye

            Or perhaps LARP’ing.

          • iksnilol

            It isn’t really dress up games. removing that extra barrel really helps with handling.

            Am I LARP’ing if I have a 18 inch barrel on my Remington 700? I mean, that’s what SWAT guys use. Or is my Aimpoint LARP’ing because the millitary uses them?

          • dannye

            18 inch barrels on a bolt action and Aimpoints don’t require paying $200 to the enemy of civilian 2A rights. There is nothing wrong with cosplay and LARP’ing, unless you’re giving money to the Waco baby killers.

            Also cutting 6 inches of pencil barrel off a bullpup won’t do a damn thing for handling unless you’re actually clearing closets and rooms. Now considering the PS90 has a magnified ACOG on it, it is safe to say that is not what it is being used for.

          • iksnilol

            Uh, 6 inches off anything will be easier to handle. Also, isn’t that a Mini Acog? They are basically glorified red dots (under 2x magnification).

          • dannye

            Yes, 3 ounces less makes the gun swing around so much faster. But please believe it doesn’t snag on imaginary doorways (see: LARP’ing, cosplaying).

            And no doubt the 2x (or 1.5x) magnification helps when you’re dealing with point blank ranges when the 6 inches of extra barrel might matter. Heh. Let’s wear NVG’s in daylight while we’re at it.

          • iksnilol

            Imaginary doorways, maybe, but car interiors are real. + it is easier to store. That goes under handling IMO.

            Also, I think you’re using the P90 wrong if all you’re using it for is point-blank ranges. I don’t think 1.5x magnification for 200 meters is unreasonable or too much.

          • dannye

            Yeah, let’s see where that PS90 is being stored inside the Porsche. Otherwise: giving money to baby killers for cosplay and LARP.

          • iksnilol

            Or to fit in a laptop case, or backpack.

            There’s plenty of reasons for a SBR, especially if it is as compact as a P90.

          • dannye

            Look at all those LARP scenarios. ๐Ÿ™‚

          • iksnilol

            Not really a LARP scenario. I usually carry firearms concealed. Though i don’t have a P90, only access to a folding stock AK.

            The reason for CC is that carrying gats and straps ain’t as legal everywhere. So having some insurance in my laptop bag makes for some peace of mind.

            Having it fit in a backpack is simply practical when going out in the forest and you don’t want people to know you’re armed (see my “not legal to carry everywhere” paragraph).

            So yeah, “LARP” for you, reality for others.

          • dannye

            I would like to see a person carry a PS90 SBR in a briefcase as a conceal carry, and say with a straight face that they’re not pretending to be a secret service agent.

          • iksnilol

            Easier to just throw it into the bag than to bother with a holster for a pistol.

            Besides, SS uses Uzis.

          • dannye

            Not any more they don’t. See the wikipedia page for the P90.

          • iksnilol

            My point still stands. I don’t pretend to be somebody if I am doing something similar to somebody.

            By that logic we’re pretending to be WW2 Soviets if we have a Mosin Nagant.

          • dannye

            It’s the amount of effort one puts into the imitation. Duh.

      • All the versions strip the same. SBR FSP90 is kinda rare. Usually why a civilian gets the SBR version is to attach a silencer.

    • So people know its an SBR and not an SMG/PDW.

      • dannye

        Then it would be a P90, not a PS90. Duh.

        • Sure, but then you get everyone who doesnt see the “S” asking if its full auto. Cant win!

          • Stan Darsh

            Soโ€ฆis it full auto?
            P.S. I heard you can suppress these!

          • BrandonAKsALot

            Sure looks like a full auto machine gun clip on top. I bet that S is added for sinister, because it’s extra evil.

  • Swarf

    That thing… I mean, I believe you that it’s fun because I respect your taste in firearms and you seem to like it, but it just looks so uncomfortable to shoot. Like Mosin Nagant crappy grip angle but worse.

    That aside, that’s a pretty efficient machine to field strip.

    • Vitor Roma

      Why uncomfortable? It is very light, very compact, well balanced since it’s a bullpup, has a low recoil round. The grip may look weird, but I’ve never seen anyone complaining about it.

      • Even on full auto its very low recoil. You could even fire it full auto in a one handed grip and not lose control.

    • TDog

      I’ve found it to be very comfortable and well balanced.

    • BrandonAKsALot

      It’s ridiculously fun to shoot and once you take a minute to really get situated, it’s very comfortable. The LoP, is very short, but it’s strangely comfortable. The recoil impulse is very bizarre though. Totally different world than gas op and even very different compared to other blowback guns. It makes a great bedside gun to me. 50 rounds of low recoil ammo in a compact and shoulderable gun.

  • Riot

    Huh this was playing james’ handgun video if I clicked on it from the main page.
    Weird

  • Tassiebush

    Thanks for that. I did not realize they are a blowback.

    • Is there are in production semi or full auto in the last 20 years that isn’t blowback?

      • Tassiebush

        Sorry I don’t quite understand what you ask. I think the auto spell on your device has changed the words.
        I always assumed that the P90 or PS90 must have some sort of lock up or delayed blowback given that it fires a bottle necked case of presumably a fair bit more pressure than most other simple blowbacks. So that is quite cool.

        • The Five seveN Pistol uses a patented delayed blowback system, but the PS90 is straight blowback. What’s interesting about that is that this allows the Five seveN to fire hotter ammunition than the PS90.

          • Tassiebush

            There’s definitely an interesting article that needs writing about the limits of simple blowback.

  • Rnasser Rnasser

    Man, the mag change is really awkward…

    • Dave

      Not really. For a right-handed shooter, left hand comes over the top while the weapon is at the shoulder, pointed at the target/threat, fingers grasp magazine, thumb operates catch, lift up rear, pull out, ditch, swap.

      • Rnasser Rnasser

        Can you do a no fumble 2-3 second reload? with it?

    • Mike Lashewitz

      At 50 rounds if you actually need a magazine change you either need much more practice or you are just spraying ammo.

      • Rnasser Rnasser

        So, it is a modern version of the “load on Sunday and shoot all week” gun? ๐Ÿ˜€
        Keep in mind the caliber isn’t really a super stopper, and that not all the bullets hit the intended target…

        • Mike Lashewitz

          Especially when the police are shooting. 16/100 not good.

  • BattleshipGrey

    Are the mini ACOGs also 4x? It seems it might be a little overkill to go with a fixed 4x optic, unless you’re not using it as a go-to defense weapon, then carry on.

    • iksnilol

      I thought the Mini ACOGs are 1.6x?

  • John

    “Weirdest looking”…yes, I concur. It looks like someone threw an AR into a fire and took it out when the stock got all gooey.

  • Gjert Klakeg Mulen

    Hey Alex, guess what. Hickok45s youtube channel is terminated again…

  • Broz

    The PS 90 just cries out for SBRing!!!

  • MRHapla

    The Boys at Stargate Command sure loved them.

  • Giolli Joker

    So much want!

  • Realist

    I remember first reading about this rifle in a book called “After America”…

  • Dave

    My Beretta Cx4 9mm is pretty simple too:
    1. Remove magazine, ensure chamber is clear, safety on.
    2. Check again.
    3. push out the latch, if for some reason it seems stiff, use the blunt end of a 9mm ctdg.
    4. Separate the “upper” from the “lower” by sliding the two in opposite directions.
    5. Set aside the “lower” and grasp the reciprocating bolt handle, pull pack all the way and lift out. The telescoping bolt now slides out from the rear of the “upper.”
    You’re done!

  • Mike Lashewitz

    Why am I not comfortable over a plastic gun in a combatant situation?