With Silence! you will now be able to attach a silencer to your guns. Just press 'X' or the button you define in the .ini, to toggle it on and off for that weapon.
Each gun has its own setting, so you'll be able to swap between your silenced pistol and your loud shotgun with ease.
-Separate firing sounds for suppressed and loud modes
-Peds don't flee from the suppressed sound unless they are close enough to hear it
-Louder un-suppressed sounds (because cops firing at you from a distance used to sound like cap-guns..)
Planned Upcoming Features:
-Special shotgun suppressor model
-Stop player from getting a wanted-level if nobody saw him kill
-Weapon Attachment Menu/Workstation (I'm thinking something like Crysis/Fallout NV)
-Snitch-Finder: Pinpoints Peds who are calling the police on you. Like in Payday 2 (Can be toggled off if you feel it detracts from the immersion)
-Weapon stats will be modified depending on whether or not the weapon is silenced