^^ WHAAT?? Indian government can't ever afford helmets and armor from MKU, which sells to the United States Armed Forces and others,
maybe you should point a specific company
airvoila.com/wp-content/uploads/2008/10/sukhoi-su-47-berkut-aguila-dorada-vista-desde-la-panza.jpg
I can't post pic but check this out, the berkut belly in 97'
it had a belly similar to that of f-22 and f-35(stealth wise)
the Russians will probably change PAK-FA as this is only a prototype