VSK-94
SR-2 Veresk
AK-12 Obr. 2020 with Zenitco Sport-12U rail and numerous other Zenitco parts
Vortex XM157 FCS reportedly shit the bed after 1k rounds of 6.8

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New Chassis design from Sureshot Armament Group (Russia) that mates with their AK-308 compatible Spear-308 receiver
So there's this Russian speaking Al-Qaeda militant in Idlib, Syria. Like most foreign fighters in Idlib he has way more money than domestic Jihadists and since his occupation is, well War, he spends a large portion of his income on weapons and equipment and own many firearms (including a custom AK-105, 2-3 Bullpup AK conversions and a craft made anti-material rifle). But that's not what I wish to show you.
This is
This is, I believe an old MAS-36 that has been rebarreled to 7.62x51 (such things are not unheard of in Idlib). He seems to have built this thing as somewhat of a Joke.
3D Printed Lower for proprietary Desert Tech "Quatro" Magazines
Dutch Popo with Magpul D-60's
Apparently, the Barrett MK22 was having issues with receivers (the portion that holds the bolt and trunnion and what would be considered the rail on an AR are an integrated piece) cracking when the bolts that hold the barrel(s) in place were torqued to Barrett's own specs.

Barrett is sending out new receivers with unknown differences besides a new distinguishing mark
RPD mated with a G3 Trigger pack that has Binary fire as an option