⣿⣿⣿⣿⣿⣿⣿⠿⢟⡛⠛⠛⠛⠛⠋⠸⣿⣿⡆⣿⣿⣿⣿
⣿⣿⣿⣿⢟⠩⠂⠉⠄⠄⠄⠄⠄⠄⠄⠄⠘⢛⣡⣿⣿⣿⣿
⣿⣿⠟⠁⣀⣀⣤⣤⣤⣀⣀⡀⠄⠄⠄⠄⠄⢻⣿⣿⣿⣿⣿
⣿⢋⣴⣿⣿⠿⠿⠿⣿⣿⣿⣿⣿⣶⣤⡀⠄⠘⣿⣿⣿⣿⣿
⡏⡎⣩⣐⣲⣼⣿⣷⣔⣊⣩⣛⠻⢿⣿⣿⣦⠄⣿⣿⣿⣿⣿
⡇⢱⣿⠿⢈⠿⡿⠟⡋⠹⣿⣿⣿⣷⠌⠻⣿⡇⣿⣿⣿⣿⣿
⢇⡇⣶⢎⣿⣿⣾⣿⣿⣿⢰⣬⢩⣵⣾⣷⢈⢇⣮⡝⢿⣿⣿
⡸⣷⣙⠻⢟⡫⠌⠻⠿⠿⠿⢟⣸⣿⣿⡟⣠⣾⣿⣿⣷⡝⣿
⣷⣙⠿⣿⠿⣿⣿⣿⣿⣶⣿⣿⣿⠿⠋⢼⣿⣿⣿⣿⣿⣿⢸
⣿⣿⠁⢀⡚⠆⠄⠉⠉⠉⠉⠁⠄⠄⠄⠈⢻⣿⣿⣿⣿⣿⢸
⣿⢛⡠⢶⢉⡀⠄⠄⠄⠄⠄⠄⠄⠄⠄⠄⣴⢹⣿⣿⣿⣿⢸
⣿⣶⣌⣃⠈⠙⠳⢦⣄⣀⠄⠄⢀⣀⣤⠞⠁⢿⣿⣿⣿⢏⣾
⣿⣿⣿⡇⠄⠄⣸⣶⣮⣭⣭⣭⣭⣭⣄⡀⠄⣛⣛⣩⣴⣿⣿

Just checked, unfortunately these sounds are from the GOG version of the game, which is what I'm upgrading *from*. Still, thank you very much.

I'm updating the weapon pack. In the original PS2 release, the guns use combinations of various sounds that play in tandem, and that's a huge hassle to handle. For the GOG release, they merged the sounds together, which is pretty convenient, but they also lowered the sampling rate.

Here's the MGS2 one I used: https://www.reddit.com/r/metalgearsolid/comments/1jt1vg/official_metal_gear_solid_sound_effects/

I tried searching for the MGS4 one, but I can't seem to find it anymore. It was a reddit post as well but it might have been taken down or something.

You can also check this out, from the official soundtrack of MGS Portable Ops, it contains a lot of the commonly heard MGS sound effects throughout the series, in crisp quality: https://downloads.khinsider.com/game-soundtracks/album/metal-gear-solid-portable-ops-psp-original-game-soundtrack/44%2520SE%2520Collection.mp3

Good luck with your project, I really liked playing in your recreation of the Shadow Moses Island, pretty damn faithful recreation!

Damn it... I'm getting the sounds from the original PS2 release, and it's a huge mess. Can you point me to some of these sources?
Btw, thank you for your time.

I didn't extract them, I found multiple forum posts with the sound effects extracted and uploaded.

I think I used a pack from MGS2 and one from MGS4 as well.