The Ruger GP100 is a double-action revolver chambered in .357 Mag with a 5-inch stainless steel barrel. It holds 6 rounds and has a half-lug barrel profile. The stainless finish is consistent across the barrel and frame. 
 

Key Specifications 

• Brand: Ruger 
• Model: GP100 
• Caliber: .357 Mag 
• Action: Double Action 
• Capacity: 6 rounds 
• Barrel Length: 5 inches 
• Color/Finish: Stainless 
   

Detailed Features 

• 5-inch stainless steel barrel with half-lug profile 
• 6-shot cylinder 
• Full stainless steel construction 
• Double-action trigger with exposed hammer for single-action option

GP100 owners consistently mention durability as the standout characteristic. The stainless construction holds up to steady use with full-power .357 loads without loosening the cylinder or frame, which is a concern with lighter revolvers over time. The 5-inch barrel is a practical choice for range work and field carry.

The trigger in double-action is heavier than some competitors, which splits opinion. Target shooters who prefer light double-action pulls sometimes find it frustrating, while those who want a deliberate trigger for field use see it as a positive. Single-action pull is clean and consistent.

The GP100 is generally regarded as a workhorse rather than a refined piece. Owners prioritize function and longevity over a premium trigger out of the box. The half-lug barrel on this configuration keeps weight manageable while preserving the balance of the 5-inch platform.