It's the first one having that name
You want it to have some western-ish name like HBM Mk.III?
Although i am for a standardization of missile names like DF for China instead of calling them with names that points to two different systems like Toophan which designs an ATGM and a Helicopter as well as an APC, if Iran in the future access the export market, this will confuse potential buyers, but Iran standardized the names for export Fateh with "BM-120", very simple name
For Iran only weapon there should be a separation between the liquid fueled missiles such as K-4, Emad, Qiam and solid ones into one two or three digits with a number, for example instead of having a massive number of Fateh names, just call it F-110M, F-313M, FZM (for zolfaghar), FMM (Fateh Mobin) FRM (for Raad-500) and FAM for Fattah, S-2 for Sejjil, HQ for Hajj Qassem, KSHK or KS for Khaibar and add something to recognize what it is like for Fath launcher, F-360, for export Fatehs, F-120E, F300E, cruise missiles, GH-E, NO-E (Ghadir and Noor)
For liquid fueled ones, just K1, K2, K4 for Khorramshahr series, SH1,SH2,SH3 for Shahabs, Q-1, Q-2 for Qiam, E1, E2 for Emad
For cruise missiles, SOU for Soumar family, SOU-H for Hoveyzeh, SOU-P for Paveh, SOU-AM for Abu Mahdi
Toophan for the APC, AT-TO for the ATGM, AT-AL for Almas, AT-DE for Dehlavieh
FJ5 for Fajr-5, FJ5E for export
This would make the army look way more professional and less 100% ideological although the names stays the same
