The Cimarron Thunderball is a single-action 9mm revolver with a 3.5-inch barrel and a 6-round cylinder. It has a nickel finish, a pre-war frame configuration, and a birdshead-style walnut grip. The frame finish includes color case hardening on some components alongside the nickel cylinder and barrel. 
 

Key Specifications 

• Brand: Cimarron 
• Model: Thunderball 
• Caliber: 9mm 
• Action: Single Action 
• Capacity: 6 rounds 
• Barrel Length: 3.5 inches 
• Color/Finish: Nickel 
   

Detailed Features 

• Pre-war frame configuration 
• Birdshead walnut grip 
• Nickel finish on barrel and cylinder 
• Color case hardening on frame 
• 6-round cylinder in 9mm chambering

Owners of the Cimarron Thunderball tend to be drawn by the 9mm chambering in a classic single-action platform, which makes ammunition easy to source and keeps recoil light relative to traditional cowboy-action calibers. The birdshead grip is a polarizing choice; shooters with smaller hands often prefer it over a standard plow handle, while others find it shifts under recoil.

The nickel and color case hardening combination is consistently praised for appearance. Quality control on Cimarron revolvers is generally considered solid, though some owners note that cylinder timing and hand-fitting can vary slightly between samples.

The Thunderball's single-action mechanism requires hammer cocking for each shot, which most buyers in this category treat as a feature rather than a limitation. Those who use it in cowboy action shooting events appreciate the 9mm-compatible cylinder, and moonclips or half-moon clips are commonly discussed in owner circles for practical range use.