This mod replaces all of the original gun, explosion, fire, and reloading sounds with more realistic audio without causing bugs.
In this version, I focused on placing more emphasis on the first 0.05 seconds of each sound, so that it is more natural sounding when repeated (especially with automatic weapons). The suppressed pistol and RPG-7/Rocket Launcher are the only sounds not changed from the previous version.
The rain bug is fixed by having short "initial shot" sounds while making use of the actual sound files for shot reverberation to extend the duration of the overall sound when not in an interior.
Additionally, many sounds within bank_137 were shortened slightly to compensate for the new initial shot sounds that are still slightly larger than normal in size, so you must replace the entire bank 137 folder.
View the README for more details.