From LSWiki

Class: Ranged Weapon Skills
Attribute: Perception
Pedagogy: Physical Training
Practitioner Term: Slinger

The ability to use slings, including weapons incorporating them such as hoopaks, in ranged combat.  When using such a weapon, this
skill influences the speed, accuracy, and effectiveness of your attacks, as well as how quickly you can ready another stone or
bullet.

Development Information: The sling skill was created by Chaos and is maintained by Lost Souls; the source code was last updated Thu
Jan 10 02:44:10 2013.

Notes

Trainers

Losthaven: Pryderi
Kolond: Duthien (only trains dwarves)
tlaxcala: Axton
Association:
Losthaven Guard: Captain Jonathan Tredwel
Guild:
Verynvelyrae: Sirinil
Quest: