The Ruger Blackhawk Convertible is a single-action revolver chambered in .357 Magnum, and it ships with a second cylinder for 9mm Luger. The 5.5-inch barrel gives it solid velocity from the .357 Magnum cartridge while keeping the overall length at 11.38 inches. The alloy steel frame takes a blued finish; the grips are Birdseye Maple. 
 

Key Specifications 

• Manufacturer: Ruger 
• Model: Blackhawk Convertible 
• Type: Revolver (Single Action) 
• Caliber: .357 Mag / 9mm Luger 
• Barrel Length: 5.5 inches 
• Overall Length: 11.38 inches 
• Capacity: 6 rounds 
• Weight: 40 oz (2.5 lbs) 
• Finish: Blued 
• Frame Material: Alloy Steel 
• Grip Material: Birdseye Maple 
• Sights: Ramp front / Adjustable rear 
   

Detailed Features 

The convertible cylinder system is the main selling point here. Swapping between .357 Magnum and 9mm takes a few seconds and opens up training or competition options where 9mm is cheaper or easier to source. The adjustable rear sight and ramp front sight allow zeroing for different loads. Birdseye Maple grips look good and fill the hand well. Frame construction is alloy steel — it handles hot .357 loads without issue. 
 

Usage 

This revolver suits sport shooters who want to run a single-action platform across two common cartridges. Hunters find the .357 Magnum cylinder useful for small to mid-sized game. The 5.5-inch barrel keeps the sight radius long enough for accurate work at practical handgun distances.

The Ruger Blackhawk Convertible gets broadly positive reception, with the dual-cylinder setup being the feature that draws most attention.

Shooters appreciate the ability to run .357 Magnum or 9mm out of the same frame. In practice this means training with cheaper 9mm and hunting or competing with .357 — the swap is quick and the cylinder change is reliable. Build quality is a consistent positive: owners describe the Blackhawk as durable and well-made, and the blued finish holds up to regular handling.

Accuracy with .357 gets favorable marks across most reviews. The 5.5-inch barrel length is a reasonable compromise — long enough for a useful sight radius and decent velocity, short enough to holster and carry without awkwardness.

Recoil difference between the two calibers is a realistic factor. .357 Magnum in a 40 oz revolver is manageable but noticeably snappier than 9mm, so shooters who are sensitive to recoil should be aware of that tradeoff.

New shooters sometimes need time to adjust to the single-action manual of arms — cocking the hammer for each shot. This is a normal characteristic of the design and not a defect, but it's worth knowing before buying. Price-to-quality discussions generally land in the Blackhawk's favor, with most owners satisfied with what they got for the money.