This mod replaces all of the original gun, explosion, fire, and bullet sounds with more realistic audio without causing bugs.
Changes from the previous version include new reloading sounds, new pitch variations, minor tweaks to all gun sounds, and a new sample frequency to fix other bugs.
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.