Moscow Times: 5 Heavy Weapons in Ukraine's Rebel War That May Have Come From Russia
This equipment includes modern Russian military hardware that was not held in Ukrainian arsenals, and which the rebels could therefore not have stolen or bought from the Ukrainian military. Some of this Russian hardware is also currently unavailable on the export market.
1) T-72 Main Battle Tank
Russia's most famous battle tank, the T-72, (see picture above) has been constantly upgraded since going into production in the 1970s. Though many military allies of the Soviet Union manufactured the tanks, a video made by eastern Ukrainian separatists appears to show a version with more modern upgrades in use with the Russian army, likely the T-72B3 model.
The T-73B3 only recently started rolling off production lines and into service with the Russian army. This latest model is not known to have been exported outside of Russia yet.
2) BMP-2 Infantry Fighting Vehicle
Australia's ARES has identified the BMP-2AM, a post-Soviet variant produced in Russia, as being in use among the separatists. While Ukraine does possess a variety of BMPs, Russia never sold the updated BMP-2AM model to Kiev.
3) SA-11 Buk Air Defense System
4) BM-21 Grad Missile Launcher
5) 259 Nona Self-Propelled Artillery
http://www.themoscowtimes.com/business/article/5-heavy-weapons-in-ukraine-s-rebel-war-that-may-have-come-from-russia/515557.html