Revolver cartridges like the .38 Special and .357 Magnum have a rim that holds them in the chamber. Semi-automatic cartridges like the 9mm, .40 S&W and .45 ACP are “rimless.” Technically, they have a rim, but it is slightly smaller than the diameter of the case. The recently introduced Charter Arms Pitbull is a revolver that uses a 9mm round, a cartridge better known for being used in semi-autos.

To work in a revolver, rimless cartridges need some sort of device to hold the cartridge in the chamber of the revolver’s cylinder. Both S&W and Taurus rimless revolvers use a full-moon or star clips that hold a full cylinder of rimless cartridges. Instead, the Pitbull foregoes the clip method; its extractor incorporates a spring-loaded lip of steel that makes full contact with the rim of the rimless cartridge. This allows for the insertion and retention of the 9mm cartridge in each chamber of the cylinder. The system also enables the user to quickly eject the empties. There is no need for a half- or full-moon clip. The chambers of the cylinder are also stepped, so the case mouth of the 9mm bottoms out or headspaces on the step, preventing it from falling through the chamber.

Ready to Pounce

Like all Charter Arms revolvers, the Pitbull is strong, lightweight and reliable. Charter Arms has been perfecting economical and reliable compact revolvers for decades. The Pitbull uses the same ultra-durable, one-piece frame found on its iconic cousin, the .44 Special Bulldog, making it plenty strong for today’s hot 9mm ammo.

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