Star Wars: A Flicker of Hope
Slinker Weapon Upgrade
Only slugthrowers and missile weapons can be upgraded as slinkers. Once a weapon is made a slinker, it can no longer fire normal ammunition (and slinker ammunition costs twice the normal price). Slinkers are equipped with simple sensors and battle computers, and programmed to fly around obstacles or even around corners to strike a target.
If a slinker is fired at a target with cover (but not total cover), the target does not gain the normal +5 cover bonus to its Reflex Defense. If an attacker wants to fire a slinker at a target with total cover (where the attacker cannot see, such as around a corner), the attacker selects a specific target square outside his line of sight and makes an attack with a +0 bonus against anything in that square. (This tactics is effective with area attacks, which can strike close enough to do damage even when poorly aimed). The path from the attacker to the target square cannot have more than a single turn (maximum 90 degrees).
Source: Scum and Villainy, p. 44.