Syrik's Drunken Sailing
Scopes are telescopic sights mounted on rifles to increase accuracy at range by magnifying the target. Scopes reduce the penalty for ranged attacks by 1 for each range increment.
A firearm wielder can choose to spend a full-round action to make a single shot with a firearm that has this sight. When he does, he can resolve the attack against the touch AC of his target regardless of the range increment.