eBay Blu Ray Modification

You can see where I cut the end on the laser off and was able to screw in the lens of an Aixiz housing allowing me to focus this laser to a pin point beam. It will burn dark material and cut black trash bags as well as pop balloons. It isn't near as impressive as the DIY Red I built but this laser also only costs around $10.

I'm sure they are still being sold. The guy I ordered from had reds, greens and bluray. Some even came with assorted patterned lense caps.