Hey ,
I use a B-Looped Fire Sound, with a FireLoop_Cue and FireEnd_Cue (im Using prototype weapons). Maybe I just made a mistake but besides that its working great.
Regarding the networking, yes thats no childs play and more core, I’ve more or less done this in Unity with C# was a lot of ground work. Well I’m okay as long as everyone can play and its authoritative.
I’m currently trying to enable bobbing of the weapon while running/walking, do you plan to add such things later on? Its more polishing in the end but yeah 
Request: can you try to please record your video tuts @ youtube at 720 or 1080? I can hardly see anything with 420 which makes it a bit harder to follow and closely see whats going on.
Thanks