from what i understand, for aircraft the airframe must have been built and proposed to be armed (yak141 case) or demonstrated / tested by a nation and added to fill a gap (F16AJ case)
No tech demo aircraft (BAE EAP, MiG144, SU47, X-32)
Stuff that was built and armed but never entered service with that nation in that configuration would be accepted (F-20 is the main one i can think of off my hea)
I would say that fits under the yak141 type of tech demo. It was fully planned to enter service but Romania just ran out of money for the project. BAE and SU47 where never going to enter service and where to test the concept
What i really would like is to ask a question if self designed planes, ships, vehicles and tanks are allowed alongside franken vehicles like fusing the wings and armament of a FW-190 with the fuselage of a P-51.
I Didn’t wish to start a argument that will get me into trouble.
As far as I know I’d say clearly no: such aircraft are not real, and completely fictional fabrications, completely fake.
Maybe there are some exceptions in history:One that pops to mind was a B-24 that was modified with the front section of a B-17, dubbed “Liberfort”, but that never went beyond experimental phase:
IIRC there was also a B-17 with B-24 nose and tail turrets.
Or the famous case of a DC-3 that had a wing damaged and got it replaced with a smaller wing from a DC-2, and becae famous as DC-2 1/2:
I can’t go draw an F-16 with RSW and have it added, but if one were to exist as an armed prototype, it could be. That’s the easiest answer I have
I do hope gaijin will end up a little lenient with unarmed prototypes as we run out of aircraft, I really want the Dassault Mirage G or Mirage III V/Balzac