Expecting to see Turkish weapons on chinese stealth aircrafts ?
While I am for the most part, optimistic about the open architecture nature of Chinese platforms sharing the same databus protocol with NATO/Turkish systems, enabling continuous modular improvement, in this instance I don’t think Turkish weapons can find their way onto FC/JF-31 specifically.
For 5th gen aircraft, BVR missiles have lot more requirements and interactions with the airframe itself, so much so that missile sometimes need deliberate design alterations to meet the needs of stealth aircraft.
One rarely talked about advantage of 5th gen aircraft over 4th gen is the ability to launch missiles in far greater ranges of flight envelope, specifically in high G-load and supersonic speed ranges. Unlike 4th gen fighters that, despite their maximum speeds often exceeding mach 2, are usually still restricted to subsonic speed ranges during most of their combat maneuvers, especially when launching their missiles. This is in contrary to 5th gen aircraft, which as set by F-22’s example, seeks to possess advantage over 4th gen also in BVR agility and flexibility, able to have more windows of attack while possessing greater energy in evading incoming missile, reducing probability of kill.
This means the munition bays of a stealth aircraft have to be designed in conjunction of its intended armament, to not just release, but purposefully eject the missile out of the munition bay to avoid aerodynamic interference and risk of collision, which means trying to accommodate new missiles of different origin into the internal bays of FC-31 is more costly and complicated than say, JF-17 or J-10CP.
Moreover, newer advanced 5th gen projects like F-35 and J-20 also sports the introduction of EODAS, which allows for 360 degrees attack via BVR missile in completely novel guidance and navigation modes. While I’m not sure if the export FC-31 will sport this feature, it is something that I don’t think turkish missiles are ready for yet.