Similar to a +1 weapon, the DM will add +1 to the AC hit when using this weapon. However, this weapon does not have an inherent damage bonus.
Sling
This non-magical weapon may be used as either a staff (using melee stats) or a sling (using ranged stats). Switching this weapon from melee to ranged or vice versa does not incur any time penalty whatsoever.
You have the option to use sling bullets/stones (they’re not required) when making ranged attacks with this weapon, but not when making a melee attack.
non-magical weapon
Unlike standard slings, this is a 2-handed weapon, so shields or other offhand items may not be used while wielding it.