UntangleWorks tries the Acetech Quark-M and Quark-R tracer units for airsoft use if they can also work with paintball... "Here do I talk about the Actech Quark R  and Quark M tracer that can be used for 68 cal paintball markers to be fair this is not the only option. The Umarex T4e TR 68 X-tracer is also a option, but I will be testing that model on a later date. And make mounds for that tracer as well."