Russian AR-15s that take Modified AK-74 Magazines

Hrachya H
by Hrachya H

AR pattern rifles are relatively new on the Russian market but are already presented in a wide variety of configurations, from pistol caliber carbines to AR-10 style rifles and everything inbetween. Most of them are largely just ARs, nothing special. However, one company, Souz-TM, makes pretty interesting AR-15 style rifles that are chambered in 5.45x39mm and take modified AK-74 magazines. The company offers a DI version of their modified AK-74 mag fed AR called STM-545 and a short stroke piston operated one called STM-415.

Russian ARs @ TFB:

Reportedly, the magazine conversion is done simply by deleting the front and rear locking lugs of the AK-74 magazines and cutting a side hole for the AR magazine catch. The magazine well is also modified to accommodate the AK-74 mag geometry. Although the case body taper difference between the 5.45×39 and 5.56×45 cartridges is minimal, it still exists and the use of the 5.45 AK magazine body should aid in the feeding reliability compared to using 5.45 AR mags in standard AR lowers.

Souz-TM STM-545

These Souz-TM rifles feature machined 7075-T6 aluminum receivers, chrome-lined cold hammer forged barrels with 1/2×28 muzzle threads, Souz-TM muzzle brakes and trigger mechanisms, and DLG Tactical or FAB Defense pistol grips and stocks. The metal parts are Cerakoted. The price on the Russian market for the basic configuration STM-545 DI rifle is 320,000 rubles which is a whopping $5200.

The short stroke piston operated Souz-TM STM-415. Note that AK-12 magazines can also be modified to be used in these rifles.

To me, the 5.45×39 cartridge has a superb design and would make a great precision weapon cartridge if match-grade ammunition was made with the use of brass cases and match bullets. Such 5.45 ARs (or better yet unmodified AK-74 mag fed ARs) in an SPR configuration and with match-grade ammo would be really interesting for military, LE and civilians in countries where 5.45×39 is a standard issue military cartridge (many of the post-Soviet countries) and AK-74 magazines are ubiquitous.

Pictures by Souz-TM,

Hrachya H
Hrachya H

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

More by Hrachya H

Join the conversation
2 of 70 comments
  • Mig1nc Mig1nc on Dec 04, 2022

    Foxtrot Mike has some new AK mag pattern lowers, including 762, 556 and I think 545. They look like real winners. Check out YouTube.

  • N0truscotsman N0truscotsman on Dec 22, 2022

    Id be far more impressed if the lower was made to fit standard ak74 magazines.