Ukrainian “Crook” Chassis for Mosin-Nagant Rifles

Ukrainian company called “Crook” (Крук – means “raven”) makes an aluminum chassis for Mosin-Nagant rifles. It fits all models of Mosin-Nagant rifles including the early ones with hexagonal receivers and doesn’t require any modifications to the rifle. Basically, you just remove the Mosin-Nagant wood stock and drop the action into this chassis.

If you visit the company’s website, you’ll see that there is no information in English. However, I contacted them and Maksym Muratkin – a managing partner of the company, kindly answered to all my questions. So the information in this article is provided by the manufacturer. They will also launch an English version of their website soon.

This chassis is made of 7021 aluminum. The length of pull, cheek rest height, and butt pad height are adjustable. The stock attachment threads are identical to AR-15 buffer tube threads. So the owners of the chassis can easily replace the stock with any AR-15 one. The rectangular cutouts on the detachable forearm are not M-LOK slots. However, they are tooling up to offer the forearm portion both with M-LOK and KeyMod systems. The Crook chassis also accepts Archangel/ProMag Mosin-Nagant magazines. The pistol grip mounting points are available for either AK or AR grips. The chassis also comes with 3 Picatinny rail sections, each 2 3/4″ (70mm) long. This product has a Cerakote finish. Although their basic colors are Graphite Black, Forest Green, and Coyote Tan, other Cerakote colors are also available upon order.

Crook chassis is available through the manufacturer’s website at $450. The price includes mentioned 1913 rail sections, too. Although the company doesn’t have an official US representative yet, Maksym Muratkin said that it is possible to order directly from Ukraine and they can ship it to the USA.

Crook has also developed a version of this chassis for Remington 700 rifles which will be available in early June 2017.

Hrachya H

Being a lifelong firearms enthusiast, Hrachya always enjoys studying design, technology and history of guns and ammunition. His knowledge of Russian allows him to translate and make Russian/Soviet/Combloc small arms related information available for the English speaking audience.
Should you need to contact him, feel free to shoot him a message at



    That is not terrible, I’m impressed. 😮

    • Jared Vynn

      I much prefer the looks and functionally/modularity to the archangel stock.

  • RSG

    Seems like a nice way to repurpose some like new mosins and make them useful. Also now has the ability to use optics and mags.

    • neckbone

      At least they named it right. Most Ukrainians I know are crooks.

      • izhmash

        Found the Novorussian.

  • Dickie

    Nice but a tad to much for a mosin but if your a die hard mosin lover i get it

    • iksnilol



      • PK

        Crystal ball made from recylced whine bottles, eh?

        • iksnilol

          Yeah, though my doc said I should stop with that. Too much salt messes up blood pressure they say.

  • Major Tom

    Nyet! Rifle is fine! And unaltered hex receivers are rare enough as is!

    • Rick O’Shay

      Near as I can tell it’s not a permanent alteration, so I don’t get why it’d be a problem.

      • iksnilol

        Because a rifle made 100 years ago has to be limited to it’s 100 year old config.


        • Major Tom

          The Lee-Enfield no. 4 agrees.

      • Major Tom

        It removes (or at least the presentation versions) the front sight from the barrel. That means no bayonet.

        Plus options for detachable mags means the floorplate is removed as well.

        • Devil_Doc

          The dreaded permanent removal of a Mosin floorplate….

        • iksnilol

          Uhm, both of those can be reatached without issue.

          No harm done.

        • Rick O’Shay

          Except the front sight is dovetailed on, so the actual locking component that the bayonet uses to hold on to is still there. Unless you decided to grind it off while you were at it? I dunno. My front sight is removed, mounting the bayonet is still possible. Not that I follow why you’d want to mount a bayonet on your Mosin with this particular setup. They also specifically mention that it would work with the removable Archangel mags.

          • .45

            Why mount a bayonet? Because you can… Do you even Freedom bro?

  • xebat

    Why on earth do they waste their time with this when the Mauser action is way superior and people have known this for more than 70 years.

    • PK

      A top-notch arsenal refinished Mauser wasn’t $100 with all accessories only a couple years ago. A whole lot of people, all over the world, have Mosin rifles, and of course especially in Ukraine!

      • Major Tom

        I have one. Pre-war model too.

        • Dougscamo

          Uh, Major….which war?

          • Major Tom

            It’s from 1939 do the math.

          • Dougscamo

            Well, the basic design was 1891….with later variants, of course I feel you are familiar. with so it was still a valid question…

    • mosinman

      it isn’t as bad as you make it out to be

    • iksnilol

      Whine some more.

    • neckbone

      Just to upset you.

    • Major Tom

      Mosin action is almost indestructible under normal use. You have to go out of your way to destroy it.

      Mauser action….not so much.

    • Scott Esse

      supply and demand, thats why

    • int19h

      Because their country is in a middle of a war, and its armed forces are tapping into WW2-era arm stockpiles by now?

  • PK

    “it is possible to order directly from Ukraine and they can ship it to the USA.”

    Why would you tell my wallet this? I’m always in the mood to play with new stocks for my SBR Mosin.

    • Chief58

      Putting a $450 stock (before shipping from Ukraine) on a $180 Mosin is screaming stupid..

      • PK

        No need to call me stupid.

        We all have our own opinions on what is and isn’t worth spending money on. One of my very favorite aspects of the firearms hobby overall is that there’s something for everyone.

        Besides, it wasn’t $180. The Mosin I turned into an SBR was a rusted, but salvageable, junker I got for free.

      • I wouldn’t use the S word, but I agree that I would never do that.
        One might as well buy a brand new Ruger American Rifle with the 450 bucks, leave the Mosin in its original condition, and have two rifles instead of one.

      • furiousvet

        Back in my day it was $65 – $75 for a Mosin . But then you could buy a brand new house for $20,000, new ford pickup for about $1,500 ! Gas 25 cents a gallon, good ol’ days .

  • Uniform223

    And I suddenly think of the Mosin Nagant rifle used by The End in MGS3 Snake Eater.

    • Anonymoose

      That thing was an abomination.

    • Andrey Martim

      What a thrill…

  • Dan

    This is sorta like what the Finns did, only they used birch, Sako barrels, better sights, a two-stage trigger, and shims. I think I’ll stick with my M39s.

    The one downside to my rifles of the white death, other than the fact that they have shot a bunch of Russians in the face, take cheap ammo, and shoot MOA with iron sights, is that I can’t bolt a bunch of tacti-tard stuff to them. I guess I could get some grabbers and screw rails onto them so I can do a costa grip and put my IR/light combo on them.

    • iksnilol

      Bleh, a chassis is waaay easier. And I’d dare bet it is much lighter than the massive Tkiv-85 stock (though I do want one of those stocks).

      Just counterbore barrel if the bore is screwed, recrown and drop into the chassis. If the action is rough just deburr it and Bob’s your uncle.

      • mazkact

        Ah the TAK 85, that is my grail gun sadly I do not think any will ever make it to the U.S. I’ll just be happy with my M 28/76. My M-39’s shoot just fine in their Arctic birch stocks.At 450.00 I may have to consider this when the Rem 700 chassis comes out. To Foma Klimov, I have most iterations of Mosin Nagant, the only thing a 91-30 and an M-39 has in common is the bolt and receiver. Respectfully the sights,barrel, stock and trigger are infinitely better on the M-39.

        • Chief58

          Hopefully its an older Rem 700 you have because the new ones are garbage. Anyone who buys a Rem rifle over say a Savage rifle these days just don”t know the current state of the firearm companies..

          • Yup. Savage. Also Ruger American. Both preferable to Remington.

          • mazkact

            My 700’s are way pre Freedom group.

    • Foma Klimov

      I don’t understand appeal of M39 three line variant. It’s as heavy and fat as your pindos M1 Garand sans any of benefit and has very uncomfortable “pistol grip” built in the stock. Nothing really “better” about sights and trigger also. Very simple leaf sight and very long drag trigger like musket. Snow Nazis made many some dumb not practical guns and must make up kind of sexy mystique stories for them… have you pindosi buy them for very expensive, yes? White Death? Shoot Russians in face? LOL. Yes! You are target buyer!

      • Dan

        Da! This is what many of your komrade forebears said right before dying 400:1 at the hands of blond midget farmers on skis. In Soviet Russia, mosin shoot YOU!

        • Maxim Popenker

          Casualties and losses (from Wikipedia)
          Finland: 25,904 dead or missing
          USSR: 126,875–167,976 dead or missing
          1:400 you said?
          get back to 3rd grade and re-learn your basic math.

          • Trotsky

            1:4 is MUCH less humiliating than 1:400, so you win. Congrats on your 2nd place finish.

          • Maxim Popenker

            well, offensive operations against well-entrenched enemy always result in higher losses to attacking side; unless you’re German and
            you attack any of brave European countries, like Belgium or France.
            It could be better in terms of losses, of cause, but in the end guess who won?

          • MichaelZWilliamson

            American surplus gun buyers.

          • furiousvet

            The bargain days are over, nothings cheap anymore .

          • Max Glazer

            That’d be between 1:5 and 1:6.5 so Maksim Popenker is 100% right. Someone needs to brush up on primary school maths.

      • iksnilol

        Snow Nazis?

        Somebody really dislikes Finns.

        • int19h

          The use of the word “pindos” is a dead giveaway. Only the “patriotic” (as in, fapping on Putin) Russians use that word. It’s supposed to be an insult for Americans, except it doesn’t really work, because Americans don’t know about it. 🙂

        • I like Finns, but I dislike my contemporaries who joke with glee about blowing my compatriots’ heads apart. In any context.

          • iksnilol

            You sound like a commie to me.

      • MichaelZWilliamson

        Nyet. M39 is fine. I can shoot it all day.

    • Mr Silly

      Precisely my point. Adapt, adjust, improvise. It would seem the US soldier is no longer taught to be cunning field expedient soldier he used to be. Not good for any war, because war ruins the best plans and turns everything on its head.

  • Django

    Very interesting, is there any video on how it performs?

    • Hrachya H

      Found a couple of YouTube videos:

      • Hrachya H

        • Hrachya H

          • Django

            Amazing, thanks!

  • Just Say’n

    Old dog, new tricks.

    • Jeff Brown

      Sow’s ear, silk purse more like.

  • Sam Damiano

    Okay, I want one.

  • Nashvone

    If I found a Mosin with a broken stock or damaged sights, sure. As it is, I’ll leave my Mosin alone.

  • John

    Build a chassis for the British Enfields, and make a bid with the Indian Army for a modernized marksman rifle. At least one of their problems will be solved.

    • Porty1119

      I mean, it can’t possibly be worse than the INSAS.

  • Marcus D.

    Isn’t that a modified bolt handle?
    and the ultimate question–since the vids didn’t show it–after spending all this extra cash, is it any more accurate than it was before? Does it still make an incredible racket in an indoor range, and does it still kick like a mule? [That range in the vids was pretty sweet. Wish there was one like that around here.]

    • Scott Esse

      shooting a high power rifle in an indoor range is insipid

  • Scott Esse

    what type of leather goods? holsters slings and so forth included? if so get a website up!

  • 22winmag

    What’s up with the SKY HIGH scope mount?

    • Rick O’Shay

      I’m guessing to help the bolt handle clear. Moot point anyway, with the cheek riser.

  • Gus Butts

    Even though I’m a tacticool gearqueer, I still have a hex-receiver M91/30 that is very accurate and can shoot into a single hole in its default setup with the cheapest of surplus. It is, surprisingly, my most accurate rifle. My unissued M44 with a like new barrel, on the other hand, cannot shoot into a 4′ target at a distance of 10 centimeters. Dropping this M91/30 into a chassis and free-floating it would be amazing.

  • taylorcraftbc65

    I have a tool of the Finnish Guard, AKA “he White Death that I long range shoot with. This Chassis looks like it would be the next logical step that he Sako Factory that built my 28/30 would take in it’s logical progression at making it an even BETTER rifle to shoot Russians in the face at long range with.

  • Ted Kouznetsov

    The version I got from them has a cutout for the 91/30 front sight. The chassis does not require any permanent modifications for the chassis itself. If you want to put a scope on then you need to drill and tap, but I was able to do a scout set up.

  • Blake

    Looks nice, but
    Their Rem 700 chassis, however…

  • Rogertc1

    In my opinion it is lipstick on a pig. Just me. I have several Mosin-Nagant that I paid $90 for.

  • whamprod

    Hmmmm…… I’ve got a 1936 Tula hex receiver 91/30 just sitting around unfired for a long time……..

  • ToddB

    I thought $129 for a Boyds was a bit much to spend on a Mosin.

  • MichaelZWilliamson

    The whole point of MNs are cheap reliability. This isn’t going to improve the factory accuracy to speak of, it’s just a lot of money. If that’s your wish, by all means spend it. But it’s sheer luxury, not really product improvement.

  • Mike Lashewitz

    When the price drops . . .

  • S. Plankenberg

    But why?

  • pcjunkie429

    $450 stock for a sub $200 rifle? I guess. Does it come with a bent bolt? It’d be kinda hard to rack the bolt with a scope in the way, wouldn’t it?

  • RPK

    WTF? $450.00 for a stock to mount a rifle on when that Mosin-Nagant only cost me $79.00 as surplus military? Hmmmmm? Sounds reminiscent of the days when the $600.00 hammer and $200.00 toilet seat were acquired through military procurement channels. What a deal!

  • Kevin Anthony


  • Mr Silly

    I’m going to respond as an ex-soldier of non US background (I didn’t do the Fort Benning tour like some of my compatriots) where we literally had (and have) to keep tabs of every round and you pay for damaged magazines. A gun is just a tool. The soldier makes the weapon, and if you’re truly a soldier, you’ll learn to work around whatever obstacle placed in front of you. Heavy cardboard makes a good enough magazine. If you have to load every round singularly, then that is what you’ll do.
    Wars were fought and won without magazines before.