• Rifled Blastershot Launcher
• Item Level 245Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Gun
• Ranged
  
• Speed 2.90
• 460 - 770 Damage
• (212.1 damage per second)
• +43 Agility
  +39 Stamina
• Durability 90 / 90
• Requires Level 80
• Equip: Improves critical strike rating by 43.
  Equip: Increases attack power by 59.
• 
• Sell Price: 17 72 59

Source

This item drops from Onyxia in the 25-man version of Onyxia's Lair.

Patch changes

• Patch 3.2.2 (2009-09-22): Added. 
  

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB