USPSA - CO - G19 mix match gen?

Does USPSA allow to swap generation slides and still be CO?

I have two Gen 4 19's, and a Gen 6 19. I get that stupid double wall on the Gen 6, but if I swap slides, no double wall with a Gen 4 frame + Gen 6 slide, or Gen 6 frame with Gen 4 slide.

The double wall is annoying on longer shots, and doesn't exist on my Gen 4's, but I prefer the frame of the Gen 6.