The Cimarron 1851 Richards-Mason is a .38 Special single action revolver with a 5.5-inch barrel and a 6-round cylinder. It has a case hardened frame, blued finish, walnut grips, brass backstrap, and 3-dot sights. The CA926 is a conversion model built on the 1851 pattern. 
 

Key Specifications 

• Brand: Cimarron 
• Model: 1851 Richards-Mason 
• Caliber: .38 Special 
• Action: Single Action 
• Barrel Length: 5.5 in 
• Capacity: 6 
• Color/Finish: Case Hardened / Blued 
   

Detailed Features 

• 6-round cylinder capacity 
• Walnut grips with brass backstrap 
• Case hardened frame with blued finish 
• 3-dot sights 
• Richards-Mason conversion model (CA926)

Owners of the Cimarron 1851 Richards-Mason appreciate it as a working replica of the cartridge conversion revolvers that bridged the percussion era and fixed-round ammunition. The case hardened and blued finish combination draws consistent praise for fit and appearance out of the box.

The .38 Special chambering is a practical choice for this pattern. Shooters who use it for Cowboy Action find the caliber easy to handload at low pressure, and the 5.5-inch barrel gives a comfortable sight radius for target work. Single action manipulation is predictable and the trigger pull on most examples is clean.

The main criticism is directed at the sights. The 3-dot setup feels out of place on a heritage-pattern revolver to some owners, who prefer a period-correct notch. Walnut grips are well-finished but a minority finds them slightly oversized for smaller hands.