I'm sure there all original as they float and are transparent but I always like a second opinion before putting them into my collection or on a figure that might one day be sold on. Original or repro
Never really like commenting on this sort of thing unless I a) have it in hand or b) can see it's clearly fake....but I reckon all four look good to me in this instance.
They look fine to me. The only chewbacca repro I know about is painted and it sinks in water.
About the blue bespin blaster again I only know about the ones that sinks in water. I do not know if there is some repro of this 2 weapons that floats :?