There are three phase
1- T129Edh(20mm gun and 76mm rockets)
2- T129B1(20mm gun,76mm rockets,Umtas,L-Umtas,Cirit,Stinger,some Ew equipments)
3- T129 B2(20mm gun,76mm rockets,Umtas,L-Umtas,Cirit,Stinger,Upgraded Ew Equipmets)
Probably,all T129Edh(first nine helicopters) have been upgraded to B1.