Flasher Launcher

Flasher Launcher is a crossbow which can only be used by Jan Jansen, who made this crossbow. It can fire all normal and enchanted bolts, but it can also fire Flasher Master Bruiser Mates, ammunition invented by the same creator. It can be used by him as long he has at least 8 strength. It has a speed factor of three, a thaco bonus of +1 and it weighs 10 lbs. This item appears in Baldur's Gate II: Shadows of Amn.

In-game description
"This is Jan Jansen's crossbow, and such is its complexity that only he can use it.  Likewise, only he can make the special ammunition it is capable of firing.  Substantial tinkering on this launcher has made it especially accurate."