Light Crossbow +2

Light Crossbow +2 is an enchanted crossbow, which adds a -2 THACo and a +2 damage bonus to all bolts shot from it. It has a speed factor of 3 and it weighs 5 lbs. This item appears in Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition.

It can be bought from the Adventurer's Mart or Jayes in Athkatla.

In-game description
"A crossbow is a bow mounted crosswise on a wooden or metal shaft, the latter called a tiller. The bow is usually made of ash or yew. The crossbow fires a quarrel (also called a bolt). This magical crossbow is elegant and light in the hand, with little recoil."