The Stallion is a silver pistol with four barrels and a compact design.
According to Galen Tyrol, the Stallion is not a military issue sidearm.
Meier, a follower of Tom Zarek, carries two Stallions with him during Laura Roslin's and Commander Adama's joint expedition to find the Tomb of Athena on the surface of Kobol. Against direction from Zarek, Meier proceeds with the abandoned plan of eliminating Lee Adama, thus removing him from further political interference in Tom Zarek's political agenda with the President.
Meier hands one Stallion to Sharon Valerii to use to kill Commander Adama, while he agrees to kill Lee Adama. But Valerii feints the attack: during the crucial moment of assassination, she betrays Meier and shoots him with his own gun, who had aimed his Stallion at the head of Lee Adama. After stating her intentions, she surrenders her weapon to Commander Adama.
Note
The "Stallion" is, in reality, a Marushin COP 357 gas-powered pistol, which shoots 8mm BB rounds. In a curious coincidence, this gun also makes an appearance in the motion picture Blade Runner, in which actor Edward James Olmos has a minor role.
The name "Stallion" may be a production in-joke on the Marushin's model name, "COP 357," whose name is shared in part with the ubiquitous Colt .357 handgun.