For me there can be two possibilities:I am unsure on multiple projects ERSAM XRSAM though, ERSAM is what, extended range? X or Ex whatever they pronounce maybe its just XRSAM system. I know that old sky blue pic where DRDO revealed ERSAM, but that one is quite old & later evolved into being called XRSAM? Maybe its just XRSAM pronounced exRSAM (aka ERSAM)
1. ERSAM = Enhanced Range SAM
XRSAM = eXtended Range SAM
2. ERSAM = Extended Range SAM
XRSAM = eXtreme Range SAM .
If we go by this pic, here it is mentioned that the missiles will be having the Active Radar Homing Seeker.







look just because its named Kusha you can not insult it like that
they tried very well to hide, could have named it kasha. 







