Increased firepower for pistols, smg and rifle. This modification for all, who think that classic weapons too weak, or want make witch crowned by this guns. Also this is a good choice, if you are playing with increased spawning of common and special infected.
My stock SMG sounds for L4D1. Thanks to Spybreak001's help. I hate that the Uzi in this game still uses the MP5 from Counter-Strike: Source. Reload sounds are from Sofad.
Resources: Halo 2, Battlefield 4, Call of Duty: World At War, Counter-Strike 1.6 and Rainbow Six: Vegas 2.