Basically just RAF1's MiG-31, all i did to this wonderful craft was replacing the Missiles, Made the Performance more accurate and controllable as well as making bays open and close with AG2 (this also counts for the missiles)

for the use of hypersonic speed i made it controllable.

Power < 99% = Normal
Power > 99% = Acceleration for Hypersonic speeds

I used the Guardian missile (i totally didnt download from someone because i was too lazy to do it myself, no no) so i recommend keeping the lock till splash.

Oh and last thing: It might get a bit funny with low physics. I'm not saying its unflyable but it gets buggy at high speeds. i recommend going with medium physics for this one

Oh and you activate landing chutes with AG1 :3
Why that emoticon. Oh well just have fun with it as much as i have fun editing more and more nonsense to this post.