i don't understand , what you mean by "ranged attack in my firefight" ? do you mean "mass kill" ? was the kill mark with grenade /or attack helicoper ?
if it was with a weapon then that's normal remote kill and invisible player
if it was grenade /or attack helicoper then that's the remote kill i posted
for the normal remote u can find sources in this section , for grenade/heli u won't be able to do it , only jayjay , dreek and vaisd can
all i can tell you is to be able to understand it is to learn how the game engine works and you will be able to understand the code i posted