Today I was reminiscing of the ArmA 2 days and JSRS, and thought let me download the ArmA 3 version of it and just give it a go, only to find out that no so long ago Jarhead did an update which apparantly fixes multiplayer issue too
Features: The mod adds over a few thousand new sounds to the game, most ingame sounds are exchanged by these. The mod adds new distance effects to the original DragonFyre2.5 sound framework, new distance explosions and many other features back from the old (heavy scripted) version. All the cool features that could no make it because a certain type or script was needed, which also destroyed the playability for multiplayer, this new Version, called EDEN (because of the Eden Update for ArmA3) can deal with all that. Plus it stays script free. No CBA required and it works a 100% in multiplayer.
Currently downloading it and will test it then give an assessment of what I think, but already I think UO should implement this back into the UO mod-pack if it works and all.
Here's the download page in the website.