Something that you like?

I'm not sure about the range, I don't think there's a lot of info on them, super sekrit Russians after all, but considering it's firing 9x39 and it's subsonic, probably something like a .300 blackout with the same size barrel, I heard it has the same drop off and bullet ark as the 300.

Something like that, one thing about that cartridge is that it's a bitch to grt running in other guns, I think for aks they have to drill anotjer gas port near the front trunnion to run a line to the normal gas port to be able to actuate the gas piston and reliably fire.