For DIY I’ve also seen people use half inch acrylic rods to spread the laser beam out to a line. Haven’t tried it myself yet, but seems like a cheap solution if you need it _now_ since most ...
[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 ...