Star Wars: A Flicker of Hope
Bothan society is well known for its penchant for espionage, and the Bothans have developed methods of subduing targets without killing them. Bothan weapons deal +1 die of damage when set to stun or when dealing ion damage, but deal -1 die of damage when not set to stun or dealing ion damage. Bothan weapons cost 10% or 1,000 credits (whichever is higher) more than the base item.
Restriction: This template can be applied only to weapons that deal stun damage or ion damage.
Source: Knights of the Old Republic Campaign Guide, p. 78.