Hey, thanks for installing. So the steps will be as follows:

1. Open TF2 Weapons with .7zip or win.rar
2. Extract files somewhere
3. Make sure to back up any original weapons
4. Slap the new files in Steam > steamapps > common > Teardown > data > vox > tools
5. Rename weapon to what's in the brackets. Example: Scattergun (shotgun).vox -----> gun.vox
6. Enjoy!

Please do not mess these files up. Ya boy spent at least a week making these things.
If you have any questions, message me on discord at CheggChegg#5483