The largest and only tank factory has gone idle for lack of parts.

Russia had a "Made in Russia" program for the military. But apparently bribes let many side step the rules and post proud "Made in Russia" announcements in the press, while basically relabeling imported parts. Even more amusing is a fair number of those parts come from the Ukraine.

More factories isn't going to help, and these days it's hard to steer, power, target an enemy, or communicate without chips, which Russia is running very short of. Intel, AMD, and even Russia designed CPUs (Elbrus) are hard to come by, TSMC (and other foreign fabs) are honoring the sanctions.

Apparently even the basics like steel are getting hard to come by.