New Russian Rifle: ORSIS K-151

Russian ORSIS arms company has introduced a new semi-auto rifle during MILEX-2017 exhibition in Belarus. The rifle is called K-151 and it is chambered in .308 Winchester. This rifle incorporates design features borrowed both from AR and AK platforms.

The gun feeds from a 10 round magazine. It has an overall length of around 39″ (985mm) with a 20″ (508mm) barrel. The twist rate is about 1:8″ (1:208mm).

According to Belarusian news portal, the gun uses an AK-style bolt and trigger mechanism and some elements of the AR-10/AR-15 design (the upper and lower receivers layout, disassembly and pivot pins, magazine release, stock etc.). ORSIS also plans to offer a version of the rifle chambered in .223 Remington. Probably they don’t mean a conversion, but a scaled down version.

That’s about all the official information available so far. However, let’s see what we can spot on the images.

So the gun has a side charging handle, a one piece top Picatinny rail, as well as a rail section on the bottom of the handguard. The gun is gas operated using an adjustable gas piston system with the distinctive ring on the front portion which is most likely designed to adjust the positions of the gas system using a .308 Win cartridge. Note also an interesting feature – the two rows of KeyMod slots on the same side of the handguard with lower row elevated compared to the upper one.

Because of the looks of the rifle, one could assume that it is designed primarily for military or tactical use. Its appearance and characteristics pretty much make it a DMR than anything else. However, interestingly enough, ORSIS positions and advertises it solely as a hunting rifle.

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


  • Jason Culligan

    So basically it’s as if an AK, M1 and AR10 had some sort of three-way love child.

    I’m intrigued.

    • mazkact

      An AR 180 was somewhere in that pile.

  • Preacher

    … not even FN would copy this Version of the SCAR anymore.
    Why not design something on your own – instead of copy/pasting something together without know why…

    Long stroke gas piston system with super minimalistic/leightweight carrier group as the AK got would have been somethin great – Instead, they adpot FNs short stroke piston onto some super heavy bolt which is unnessary shaped like it would be an carrier with an integrated piston for long stroking.

    ORSIS, hope you will learn a hard lesson with this recipicating charging handle!

    • andrey kireev

      because copying elements of something is easier and less time / development intensive than starting out with a clean sheet.

  • LCON

    Seems like the rest of the World loves Keymod well The US is all about MLok.

    • Tony

      MLok is subject to export control. That may make it tougher for foreign companies to license it.

  • To Tin Fung

    I’m sorry, am i the only one who thinks this screams “FN SCAR”?

    • Christopher Wallace

      soviet scar

    • JumpIf NotZero


    • JoelC

      Yep. Russian built FN SCAR 17.

    • Seth Hill

      More like a SIG 55x

  • iksnilol

    C’mon, 6.5×55 with 10 and 20 round mags.

  • mechamaster

    They should considered to redesign the position of the charging handle. The SCAR-ish recipro-charging handle is the enemy of the left-thumb and optic-QD lever.

    Preferrable something like SIG550 or Xi. Directly attached in the bolt-carrier and ejection port, and protect the excess opening with dust-cover lid or Galil ACE-style springy dust-cover.

  • Cal S.

    But I thought rifle was fine?

  • Rogertc1


  • vietvet656667

    How Much ?

  • hendrik kiliaan

    No the afraid or too proud to borrow from other excellent designs.