A pair of rifles owned by the infamous feuding families. They are connected to each other by a strong gravitational pull; the closer they get to each other, the more powerful said pull is. If they come within firing range, they will both open fire, regardless of if the triggers are pulled.
Looking through the aiming scope of one shows the view of the scope from the other.Arthur Nielsen originally snagged the McCoy rifle himself, while the Hatfield was snagged by another (unspecified) Agent. The McCoy rifle was stolen by Artie while he was under the effects of Ferdinand Magellan's Astrolabe, but was retrieved by him once more with help from Steve Jinks.