Can we please put an end to this soldier/policeman debate?
A bullet will kill, doesn't matter whether the target is a soldier or policeman.
All the "police" designation has to do with international compliance. De jure, BSF, CRPF, ITBP, etc., are policemen, but de facto, they are soldiers.
When terrorism started in J&K in 1989, most of the COIN in J&K was done by JKP and BSF, and they were facing a much bigger challenge (1) lack of experience, (2) battle hardened combatants and veterans of the Soviet-Mujahideen War, (3) FN-FAL rifles good for marksmanship but not so good for COIN.
Coming to RR, it is a branch of the Army, and is under the Ministry of Defence, however, funding was provided (or owed) by the Ministry of Home Affairs to the Ministry of Defence.
These are all semantics. When it comes to COIN, the bottom line is same - whether one calls them "policemen" or "soldiers," they face the same challenges.