This is the Mexican Army's modified version of the U.S. Army's .45 pistol. The elongated and grooved barrel increases the velocity of this gun. Diego's men are armed with the Pacificador.
The Pacificador is a military .45 revolver with a wooden handle and an elongated barrel. Its stats overall are average, possessing a quick reloading speed and high accuracy rate while possessing a moderate stopping power and standard range.
Pacificador is listed in Sheriff Bartlett's Journal on pages 38 - 39 under the Side Arms section. The pages are unlocked by acquiring the weapon.
The first chance for the player to acquire the weapon is during the mission "Sunset Canyon". This weapon is not available for purchase from any shops, so it can only be acquired by killing an enemy who has it equipped.