Bullet Impact Overhaul Mod
MODIncreases the volume of the impact sounds of bullets on all surfaces and materials, their soundcracks and tails: the result is a crunchy, dangerous soundscape that will make you duck in cover in every gunfight
and my other mods, especially physics impact overhaul because it adds nice bullet casing sounds.
Basically anything that turns projectiles into actual travelling bullets rather than instantaneous hitscans improves the mod immensely.