Interesting. That's actually an ESB resin stunt prop, not any of the props seen in the screenshots. Noted by the scope mount, flash hider and body details. That's an ANH flash hider, completely unique scope mount and an ESB style scope. I've seen it in a holster at an exhibition, and it was probably holstered at multiple times on set. There is a resin blaster that was seen on a muppet show and when Luke climbs out of the X wing on dagobah, I believe this is the same one.