The Enduring Three
Rebounding Hand Crossbow
+2 Rebounding Hand Crossbow
Lvl7 +2 (2,600 gp)
Weapon: Any ranged
Enhancement: Attack rolls and damage rolls
Critical: +1d6 damage per plus
Power (Encounter): Free Action. Trigger: You attack an enemy with this weapon and miss. Effect: You make a ranged basic attack against a different enemy within 5 squares of that enemy.
You meant to do that. No, really.