There is no laser tracer system cause PZ don't have bullet tracers already.

ok

What about shoot effect on firearm? May be it possible to change it on laser beam?

I had thought about such and looked into it, I can change it do be a different color, problem is that it is hard coded, so I also change the muzzle flash of all weapons too. Hopefully they add a param for flash in the weapons scripts in a future update to make a bit more accessible