The Charter Arms Target Mastiff is a 9mm revolver with a 6-inch barrel and stainless steel construction. Charter Arms refers to it as a semi-auto revolver — it uses moon clips to feed rimless 9mm cartridges in a 5-round cylinder, which is an unusual configuration that puts it in its own category between traditional revolvers and semi-automatic pistols. 
 

Key Specifications 

• UPC: 678958799651 
• Action: Semi-Automatic 
• Barrel Length: 6 inches 
• Caliber: 9mm Luger (9x19 Para) 
• Capacity: 5 rounds 
• Finish: Stainless Steel 
   

Detailed Features 

The 6-inch barrel is the main draw for target shooting — the longer sight radius improves accuracy and the extra barrel length squeezes more velocity from the 9mm cartridge. Stainless construction handles weather and range conditions without special care. A Picatinny rail allows mounting optics or a light. 
 
The moon-clip system for feeding 9mm means the cartridges load and eject together as a unit. This speeds up reloading considerably compared to loading individual rounds, but it requires keeping track of the clips. Using 9mm also means widely available ammunition compared to some specialty revolver calibers.

The Charter Arms Mastiff occupies a niche that not everyone understands at first — it's a revolver that chambers 9mm via moon clips, which is genuinely unusual. Owners who get on with the concept appreciate the 6-inch barrel accuracy and the ability to run common 9mm ammunition. The stainless finish holds up well and the build quality is on par with Charter Arms' standard production.

The reliability discussion is the honest part: some owners report feeding and ejection issues, which are often traced back to moon clip fit and condition. Worn or improperly fitted clips create problems that properly fitted ones don't. The trigger pull divides opinion — it's workable for target shooting but on the heavier side.

Weight comes up for anyone thinking about carry, but at 6 inches of barrel this is aimed at range and home use rather than daily carry. People who buy it knowing what it is tend to be satisfied; people who expected a conventional revolver or a conventional semi-auto sometimes aren't. The concept has merit, and Charter Arms executes it reasonably well within its price range.