Stynger

The Stynger is a ranged weapon that drops off the Golem boss. It uses Stynger Bolts as ammo, which initially drop off the Golem as well and can later be purchased from the Witch Doctor or Arms Dealer with the Stynger in your inventory. The shots do an area of effect explosion which will deal damage to anything in the explosion radius. Arching shrapnel is thrown from the explosion, each causing additional explosions smaller than the original but with the same base damage.

Trivia

 * The weapon design and operation could be a reference to the R.Y.N.O. of the Ratchet and Clank Games.