I have a B&T APC223 pistol and noticed that the taper on the rear surface, length and size of the Rotex flash hider was very similar to the SF mounts. I broke out my SureFire SOCOM556-RC2 and tried to put it on and, sure enough, it fits perfectly. The locking collar on the SureFire is able to be rotated and locked into place. I checked bore alignment with a Geissele 5.56mm alignment rod and it was centered.

Obviously there are differences in the flash hiders and mounting system between the B&T Rotex and SF SOCOM (the index point is completely different between the two, which would allow the SF to rotate circularly on the B&T flash hider if enough pressure is applied). I have not and do not plan to fire the gun in this configuration, but I thought it would be an interesting tidbit to share.