Here's a shot of a BD blaster toy I converted.
I followed Thomas' tutorial to some degree, but did not do as much to the rear end, and left the barrel vents open because I wanted it to still light up. But I filled the gun with plaster, resin, and lead shot (weighs about 6 pounds now), and that killed the electronics.
I was going to add silver weathering to it, but in watching the scene in the Genosis arena, Padme's BD blaser is not weathered that way...
I added an aluminum barrel (slightly longer and narrower in diameter) and built the power cell box.