Sound of a 9mm Handgun

Requirements: OpenIV
Step 1: Run OpenIV and navigate to mods/x64/audio/sfx/resident.rpf
Step 2: Right-click weapons.awc, select "Export to openFormats (.oac)", and choose desktop as the destination. You will get a folder and a file called "weapons" and "weapons.oac".
Step 3: Open the weapons folder, drag and drop the PTL_PISTOL_SHOT.R file into it. Close the folder, then grab the weapons.oac folder and drop it into the weapon.awc file.
Step 4: Navigate to mods/x64/audio/sfx/weapons_player.rpf
Step 5: Right-click on the ptl_pistol.awc and export it to openFormats (.oac), selecting desktop as the destination. Open the ptl_pistol folder, then drag and drop the PTL_PISTOL_SHOT.L file into it and replace the existing file.
Step 6: Drag and drop the ptl_pistol.oac file into OpenIV, replacing the ptl_pistol.awc file. You're all set! Enjoy!!