application for gun license based on legal heirloom

[kalita007]

My father died back in 2020, he had two firearms in possession , one of them (single barrel shotgun) was taken into police custody during the election period. He still had the handgun with him , till the time he died.

Given the situation with my family's safety , I have been trying to obtain a gun license for my mom and sister for the same weapon. But since I do not have any idea of how that works , I could really use some advice from you guys.
location : Guwahati, Assam.