Found ChaosEsqueMod for xonotic some time ago (its really good sandbox rebuild of xonotic). But about the bug|incompatibility. This mod have vehicles with machine gun weapons. At first i tried this mod with latest dpRM fork and found what vehicles hit itself while shooting imgur.com/a/ZlF8Y - like little example. i`ve asked the mod devs about it, and they answer what they dont have any troubles with issue i reported and give me the video www.youtube.com/watch?v=vuhrRS3zWrU where we can see no self hitting. after it i tested that mod with dp engine they supply with. and yes, there was no bug. after it i downloaded all stables from xonotic 0.6.0 release date and later. it were 20121222, 20130304, 20140430, 20140513, 20160717, 20161210 versions. on 20121222, 20130304, 20140430 no selfhit, but on all after 20140430 vehicles selfhittig.