Ruger Single-Six Convertible | .22 LR/.22 WMR | 5.5″ | MFG# 0621

The Ruger New Model Single-Six Convertible (MFG# 0621) is a small-bore single-action revolver offered with convertible cylinders for .22 LR and .22 WMR. It pairs a 5.50″ cold hammer-forged barrel with a six-round cylinder and an exposed hammer/standard single-action trigger for traditional revolver operation. Intended for economical range use and precise rimfire shooting, the platform also works well for small-game field use and rimfire competition.

Product Specifications

• The model is Ruger Single-Six Convertible (MFG# 0621).
• The chambering is .22 LR / .22 WMR.
• The barrel measures 5.50 inches.
• The cylinder capacity is 6 rounds.
• The finish is Blued.
• The rate of twist is 1:14″ RH.
• The front sight is a ramp and the rear sight is adjustable.
• The listed weight is 33 ounces.
• The barrel is described as having 6 grooves.
• The firearm uses a transfer bar safety and loading gate interlock.
• The package includes an extra cylinder to switch between calibers.
• The barrel is noted as cold hammer-forged for durability and consistent rifling.
• The product includes a hard case and lock.
• The country of origin is the US.
• UPC: 736676006212.

This Single-Six Convertible offers a straightforward, time-tested single-action design with the convenience of swapable cylinders, making it a practical choice for shooters who value mechanical simplicity and rimfire versatility. The cold hammer-forged barrel and adjustable sights support precise sighting and consistent shot placement for range work and competition. The included extra cylinder extends functionality without tools and the transfer-bar safety plus loading gate interlock reflect Ruger’s focus on secure single-action operation.

Owners commonly praise the revolver’s accuracy—attributed to the cold hammer-forged barrel—and the convenience of the convertible cylinders for switching between .22 LR and .22 WMR.

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