Ukrainian state-owned firm RPC Fort (Research and Production Company Fort of the Ministry of Interior of Ukraine) is manufacturing under license a variant of the IWI Tavor chambered in 5.45x39mm Russian.

Seen pictured with the South African Milkor UBGL (40mm Underbarreled Grenade Launcher)

The Armed Forces of Ukraine are still primarily armed with 5.45x39mm chambered firearms inherited from the Soviet Union. They have adopted a small number of RPC Fort-manufactured 5.56mm Tavors, presumably in use by special forces.

Don’t load the wrong cartridge! 5.45x39mm is marked in large white letters.

Israel manufactures the Tavor in 5.56x45mm and 9mm. It has been claimed that India is manufacturing it chambered in 5.56×30mm MINSAS but I have seen no evidence of this and am skeptical.

[ Many thanks to Danny for the tip. ]