Sling

Slings are simple, fairly effective ranged weapons. Commonly used since the time of Exodus, they provide an easy method of hurling projectiles at distant foes, without a need for specialized ammunition.

According to Vetron's Guide to Weapons and Armour, the sling has a "2" effectiveness rating.

History
Slings first came into use around the time of Ultima III. In Ultima IV, a few prudent Magi first took to using them as handy backup weapons. From Ultima V onward, they changed little, although properly-shaped ammunition became somewhat less common after Ultima VI.