Half-Life 2 Pistol, USP Match a.k.a. 9mm Pistol - by Ian Moger Brun

Installation:

Open OpenIV and go to GTA V

Enable edit mode.

Replace this in the weapons.rpf folder found here - update\x64\dlcpacks\patchday3ng\dlc.rpf\x64\models\cdimages\weapons.rpf\
-w_pi_pistol_hi.ydr

--OPTIONAL--

Replace this in the WEAPONS_PLAYER.rpf folder found here - x64\audio\sfx\WEAPONS_PLAYER.rpf\
-ptl_pistol.awc

Replace this in the RESIDENT.rpf folder found here - x64\audio\sfx\RESIDENT.rpf\
-weapons.awc

Then replace this in the scaleform_generic.rpf folder found here - update\x64\patch\data\cdimages\scaleform_generic.rpf\
-hud.ytd