I contacted Star Trek prop maker Richard Coyle about the suspect Star Trek III Phaser and the Klingon Disruptor. Here is what he said:
The Star Trek III Phaser:
It looks like a very poor recast of one of my models that I used to make to sell to fans at a cons.
But it is not one of my models, not my work. too crappy.
The missing rail under the front end in front of the trigger is a mark of one of my early models as is the out of line LEDs in the Phaser One.
SO it is not off a original studio prop, it is off one of my models.
On the Klingon Disruptor Coyle said:
By the way the Klingon Pistol needing repairs is one of mine…
The two part body with the black handle is a tell.
The real ones were one part model and handle.
I think I should be involved with your site more often…
Sadly a lot of my old work shows up now as so called real props.
When I presented this info to Kevin at Piece of the Past he immediately withdrew the items.