The Ruger Blackhawk Convertible is a single-action revolver chambered in .45 Colt with a second cylinder included for .45 ACP. It has a 4.63-inch barrel, 6-round capacity, alloy steel with blued finish, and weighs 39 oz. Overall length is 10.50 inches. Sights are a ramp front with adjustable rear. The grip is black checkered hard rubber. A transfer bar mechanism with loading gate interlock is included. 
 

Key Specifications 

• Brand: Ruger 
• Model Name: Blackhawk Convertible 
• Caliber: .45 Colt / .45 ACP 
• Action: Single Action (SA) 
• Capacity: 6 rounds 
• Barrel Length: 4.63 inches 
• Overall Length: 10.50 inches 
• Weight: 39 oz (2.44 lbs) 
• Frame Material: Alloy Steel with Blued Finish 
• Front Sight: Ramp 
• Rear Sight: Adjustable 
• Grip Material: Black Checkered Hard Rubber 
• Safety Feature: Transfer Bar Mechanism 
   

Detailed Features 

1. Convertible Caliber System: Two cylinders included -- one for .45 Colt and one for .45 ACP. Swap without tools based on ammunition preference or availability. 
    
2. Single Action Mechanism: The hammer requires manual cocking before each shot. Produces a light, clean trigger pull that many shooters find aids in accuracy. 
    
3. Transfer Bar with Loading Gate Interlock: The transfer bar prevents discharge unless the trigger is deliberately pulled. The loading gate interlock adds an additional passive safety when loading. 
    
4. Hard Rubber Grip: Checkered surface provides a secure hold during extended shooting sessions. 
    
5. Adjustable Rear Sight: Windage and elevation adjustable for fine-tuning with different loads or distances.

Owners of the Ruger Blackhawk Convertible in .45 Colt/.45 ACP consistently highlight the dual-caliber feature first. The ability to switch between .45 Colt and .45 ACP cylinders is practical for range use and hunting, and it adds flexibility when one cartridge is easier to source.

Build quality is a consistent strength. Owners describe the construction as durable and reliable over heavy use, and the blued alloy steel holds up well with normal care.

Accuracy gets good marks, especially when paired with quality ammunition. Owners find it capable for target shooting and as a hunting sidearm.

The single-action experience is appreciated by most buyers who choose this gun -- the manual cocking and resulting light pull are part of the appeal for traditional revolver enthusiasts.

Recoil in .45 Colt is noticeable but controllable with a proper grip, and several owners specifically note it as enjoyable rather than a drawback.

Maintenance is viewed as straightforward. Cleaning is simple and owners report few issues over extended round counts.

On the critical side: weight at 39 oz for the 4.63-inch version is mentioned occasionally for carry use. Some buyers who prefer double-action or semi-auto designs find single-action mechanics less practical for certain applications, which is a preference rather than a flaw.