I'll start.
M-99 Saber from ME3.
Origin / Bioware have their issues to be sure. But sound design is not one of them.
https://www.youtube.com/watch?v=zC2kQRi9EIs
SOOOO Satisfying to shoot.
M1 Garand in every game ever
Game is dated as fuck, but the crack of this rifle was wood-inducing.
https://www.youtube.com/watch?v=h9CxWMKlUII&t=55s