While he was initially planning on using a diode laser, doing anything more than engraving is tricky. He purchased a cheap 40 W CO2 laser tube, but it meant that he needed water cooling ...

[Xasin] has been working on a DIY laser tag system for a while now, and it has grown to include an impressive array of features and customizability. Named LZRTag, the project started back in 2018 ...