Nope, I do mean domestic version. UVZ actually demonstrated two T-90M prototypes - one with 2A82 and one with 2A46-M5. AFAIK so far the actual delivery is with 2A46 and even Armata is mostly to be delivered with 2A46. There are fundamental production problems with 2A82: higher tube pressure for 2A82 requires steel grades that are no longer produced en mass in Russia. Relevant Soviet steel works were scrapped due to cost optimization. May be that'll be corrected but it will take quite a time.