I don't know if anyone has seen this but there was a RSTV documentary on the ITBP.
Here are some caps of some of the weapons issued to the ITBP in its formative years. I can ID M3 Grease Guns, BARs, M1 Garands, M1919A6 LMGs, M1911 0.45 (revolvers not so good at identifying), variants of SMLE GF...