I'm not sure if I'll come back to modding this or not, but it's pretty easy to change the audio if you want to do it.

@King_CreepaLot: TLS's SIG552 has Incrediary sound now, can you make same sound for AK?

Funny, I came across this since I loved Lt. Rocky's AK-105 but not the sounds.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2584571049

Combined your sounds and his AK-105 here.

I've found manually installing tends to override sounds of subscribed mods, so if you were to go to your Left 4 Dead 2 Addons folder and find the mod that says '1341259433' and double click on it (the vpk, not the picture) it should manually install it. Otherwise you'd have to find that other mod, and edit it to delete the sounds folder.

good sound

There isn't an incendiary sound file within the SG's file.

Doesn't apply to the Incendiary Ammo firing sounds.