Update: The official details on the new weapons have arrived, revealing the device pictured below to be the Flare Gun, which can ignite an enemy at long range.
Original Story: Though the official details aren't slated to arrive until tomorrow, the latest Team Fortress 2 character vignette contains a brief glimpse of Pyro's second unlockable weapon.
The device, which appears to be a blunderbuss, joins the Axtinguisher as one of the three unlockable weapons for the fire-happy Pyro class.
As with the recent Medic update, the weapons will be available to players once they earn a set number of class-specific achievements.
The free Pyro update will be available on Thursday, with full details hitting tomorrow.
Registered users can use the HD Stream.