no bhai you dont need scamjet Engine for Mach 6+ speed , this is a copy of Russian R37 missile, with some modifications by chinese , R37 is capable missile .
AN/APG-81 will block Radars of your Missile (Even your jets ) ...............countering optical, and infrared sensors is not difficult for Americans .
this is a Good weapon against counties with limited budget like Vietnam , But will be useless against JAPAN/USA .
LOL ,(AN/APG-81) will block Radar of your Missile , And there are methods to counter your infrared/electro-optical seekers ,
https://en.m.wikipedia.org/wiki/Infrared_countermeasure
https://en.m.wikipedia.org/wiki/Radar_jamming_and_deception...
LOL to counter an AAM genraly electronic counter-measures are used , why the hell Americans will use SM-6 against your AAM ??:facepalm::facepalm::facepalm: