They can't be cycled interchangeably on a gas operated firearm. It would stop cycling after the first blank if it were even possible. That's because you need a special adapter at the muzzle brake to cycle the bolt carrier if you're firing blanks. If you have this adapter installed you cannot use standard ammunition unless you want your barrel/face to explode.

GCI is light years ahead of where you think it is. Unreal Engine 5 just released for us plebs. They have already made Unreal Engine 23.