yeah there are lengthy process that occur to ensure that product remains as pure as it is otherwise its manufacturing misconduct aur fir lagao court kacheri ke chkr😆Yup
As far as I know mein ne apne studies mein padha hai generally equipments and all other things related defence is owned under gov sector so mfg also must be gov approved one or those companies with which gov has tie ups.
Most probably gov owned business are the ones who mfg it