The Cimarron 1851 Richards-Mason is a single action revolver chambered in .45 LC with an 8-inch barrel. It has a 6-round cylinder, walnut grips, a nickel finish, and 3-dot sights. 
 

Key Specifications 

• Brand: Cimarron 
• Model: 1851 Richards-Mason 
• Caliber: .45 LC 
• Action: Single Action 
• Capacity: 6 Rounds 
• Barrel Length: 8" 
• Color/Finish: Nickel 
   

Detailed Features 

• 8-inch barrel in single action configuration 
• 6-round cylinder chambered in .45 LC 
• Walnut grips 
• Nickel finish 
• 3-dot sights

Owners of the Cimarron 1851 Richards-Mason in .45 LC tend to appreciate the combination of a large-caliber cartridge in a conversion-style revolver with a bright nickel finish. The 8-inch barrel and .45 LC chambering give it a commanding presence at the range, and many buyers pick it up specifically for cowboy action shooting.

The walnut grips and nickel finish are well-regarded for appearance, though a few owners note the nickel can show wear on high-contact areas faster than a blued equivalent. The single action trigger is typically light and crisp, consistent with what Cimarron produces across this line.

Buyers occasionally point out that .45 LC ammunition costs more than common defensive calibers, which limits how much most owners shoot it. Aftermarket parts support is reasonable given the platform's popularity in the cowboy shooting community.