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.
Managing Editor Being a lifelong firearms enthusiast, Hrachya always enjoys studying the history and design of guns and ammunition. Should you need to contact him, feel free to shoot him a message at Hrachya@TheFirearmBlog.com
More by Hrachya H
![[SHOT 2026] US Palm Storm Series CAT 4 Rifles Enter AR Market](https://cdn-fastly.thefirearmblog.com/media/2026/01/31/18191/post.jpg?size=350x220)
![[SHOT 2026] Anschutz 1727 APR: Built To Win With A Big Price Tag](https://cdn-fastly.thefirearmblog.com/media/2026/01/23/23201/post.jpg?size=350x220)
Comments
Join the conversation
LIKE MY 1917 WINCHESTER 30.6 BETTER
I'm going to respond as an ex-soldier of non US background 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 as it has been the case in history for everyone, you'll improvise, adapt and adjust. Scrap metal bands, veneer, bamboo and heavy cardboard make a "good enough" single-use magazine, if you jury-rig the top 2 cm (1 inch) of the original metal magazine. If you have to load every round singularly, then that is what you'll do.
Wars were fought and won without magazines before.