M163 firing is def up there
I like BUK-M3s missile launch sound
Which one? Tanks or ships? Both sound good (personal favourite the 100 mm/56 B-34 cannon, especially as the breach opens after the cannon is fired).
Outside of what I said for soviet 100 mm cannons already, the sound of MLRS firing from another machine is honestly awesome be it tank, ship or pods on aircraft. (Ship wise rocket artillery & rocket assisted depth charges).
Niche, I’ve found out I’ve caused many people confusion but hearing a missile launch from a ship causing at random times sonic booms as they’re launched.
Also any tank treds & turboprops (wish they were as loud as they used to be).
this
They changed it but KA-50 and KA-52 rotor-blades used to sound really heavy which made them sound like true flying tanks which was awesome
this soundmod makes autoloaders sound a lot better
F34/zis5 claiming a kill
Homer Simpson saying ‘Doh!’, that should definitely be in the game

Su-100
MG42 and the German 7.62mm machine guns(MG3) are soothing to hear :/
This isn’t the noise it’s the lack of noise: finally being able to make that IS-2 engine stfu for good.
Huey direct flyover
The silent assassin prop planes that you don’t hear until they are strafing your open-topped spaa.
FFS Gaijin add some sounds to the damn planes. They are WAY too quiet.
For me, nothing beats the sound of the 38 cm Sturmmörser shell.
It’s not exclusive to Gripen. j-10 sounds like that too for whatever reason
Me personally I think the sounds of a Spitfire starting up is so… deliberate. Sexy even. 🇬🇧🇬🇧🇬🇧🇬🇧
Well, first heard with the Gripen. I haven’t noticed the J10 as much (I don’t play top tier air anymore, and the J10A wasn’t super common when I was playing top tier air).
Yeah the J-10A/C has the same flyby sound.
Probably just there for the time being, but yeah.
Coolest sound has to be that click when I close this useless steaming pile of unbalanced, buggy, cheating horse manure down.