Sling of Unerring Accuracy

The Sling of Unerring Accuracy (Sling of Unerring Accuracy +1 in-game) is a sling weapon added in Baldur's Gate: Enhanced Edition.
Compared to a normal sling +1, it has a +2 THAC0 bonus instead of a +1, but loses the +1 bonus to damage and speed factor. As a result, it is more like a sidegrade than an upgrade to the cheaper and more common sling +1, and it is best reserved for either characters with low base THAC0 to improve their accuracy, or high base damage as the difference in damage would be negligible.
Two copies of this weapon can be found in the game; one in a locked chest on the second floor of the Splurging Sturgeon, and the other up for purchase from Black Lily in the Thieves' Guild in East Baldur's Gate.