The Ruger Blackhawk Convertible is a single-action revolver chambered in .45 Colt, with a second cylinder included for .45 ACP. That convertible capability is the gun's defining feature — you swap cylinders depending on what ammunition you have on hand. The 5.5-inch barrel, stainless steel construction, and 2.9 lb weight put it in the mid-size single-action class. 
 

Key Specifications 

• UPC: 736676004720 
• Caliber: .45 COLT / .45 ACP 
• Action: Single Action 
• Capacity: 6 Rounds 
• Barrel Length: 5.5 inches 
• Weight: 2.9 lbs 
• Finish: Stainless Steel 
• Frame Material: Stainless Steel 
   

Features 

The stainless steel construction handles outdoor conditions well without the maintenance burden of blued finishes. Adjustable rear sights and a ramp front sight give you a usable sight picture for target work at moderate distances. 
 
The .45 ACP cylinder uses moon clips to headspace rimless cartridges — if you're planning to run .45 ACP regularly, factor in the cost of clips. .45 Colt runs without clips. The single-action-only trigger requires thumb-cocking before each shot, which is a deliberate choice on this platform rather than a limitation.

The Blackhawk Convertible in stainless .45 draws a consistent crowd: single-action revolver fans who appreciate the dual-caliber flexibility and the Ruger's track record for durability.

The convertible feature is the most-discussed positive. Being able to run .45 ACP when .45 Colt is scarce or expensive — or vice versa — gets real appreciation from owners who've actually used both cylinders.

Build quality and stainless finish are consistently praised. The gun holds up well and the action smooths out with use. Trigger feel is often described as clean, with a crisp break that works well for deliberate single-action shooting.

Weight comes up occasionally as a downside. At 2.9 lbs it's on the heavier side for a handgun, and some users find it tiring in extended carry or field use.

Price is a minor friction point — it sits above budget revolvers and some buyers feel the premium is steeper than warranted. That said, most owners who've had the gun for a while report satisfaction with the long-term value.

Accessory availability is thin. Holsters and aftermarket parts for the Blackhawk Convertible are less common than for more mainstream revolvers, so if you need a specific fit, expect some searching.