Weapon designing institutes

Hi, Weapon engineering comes under Mechanical Engineering. Some of the courses under weapon engineering are:
PG in Guided Missiles Engineering
PG in Combat Vehicles Engineering
PG in Air Armament engineering

But the scope is limited in it like in military specifically.
Also the scope is much good in US and UK universities.

Hope this helps.
Good Luck.

Yes ,behind my house,lives a blacksmith. I think he would best serve your purpose. It might be the best institute for you.