INSTALLATION
Openiv (edit mode on)
Drop these 3 files on:
GTAIV\pc\audio\sfx\resident.rpf\RESIDENT

Note: the audio of the pistol comes from a mix 2 diferent gtaV mods, and is an acurate audio
sample of what the MK23 sounds like with its default silencer 
(I make shure the audio has got right, left, lows, echo and dry samples)

Note2: this sound file is a modified version of "CS:GO Gun Sounds" by dognuts, the sound of every
other weapon is highter definition and better then vanilla. 