Right now, I'm hard at work on my Blade Runner Blaster kit from Tomenosuke in Japan. As a purchased kit, it's not typically much of a prop build. In this case, however, the kit has a major failing that I just can't look past: Due to Japanese law, the gun barrel can't be made of metal. So the barrel (as well as the main gun frame and cylinder) are ABS plastic.
The cylinder I can just about look past because it's pretty much always hidden inside. The frame is also mostly hidden away, so I may need to figure something out for the bits that show, but the barrel is a deal breaker. It and the frame are one molded piece of black ABS plastic and the barrel has a plug like half an inch inside... very visible. Not at all what I want in a replica.