A pakfile containing custom weapon sounds for most Kingpin weapons.
Top class weapon sounds is a pakfile containing custom sounds for most Kingpin weapons (pistol, tommygun, shotgun, HMG, Grenade Launcher, Rocket Launcher).
The original author is unknown but this is an updated pakfile. Some of the original files caused problems due to incorrect format so jjaf.de fixed them and released an updated pak6 file.
The skin is in pak6 file. Just extract/unzip the file to your Kingpin folder. This will place the pak6 file in your kingpin/main folder.
If you already have a pak6 file in your main folder then extract the new pak6 to a temporary folder somewhere and rename it to another number such as pak3, pak4 etc which you don't already have. Then copy it to your kingpin/main folder.