While not particularly deadly, it could easily put out an eye.
The weapon alerts enemies (generates noise) in a 20 unit radius.
On display in Ranger Citadel Museum. Flintlock "loans" it to you in exchange for the Leg Lamp.
- The Red Ryder BB Gun, its effect of "eye put out," and the related item, the Leg Lamp, are all references to the movie A Christmas Story.