The North American Arms Mini Revolver in .22 WMR is about as small as a functional revolver gets. At 4.50 oz with a 1.63" barrel, it disappears in a pocket or as an ankle backup. Single-action only means the hammer has to be cocked manually before each shot, which is the main trade-off for the compact dimensions. 
 

Key Specifications 

• Brand: North American Arms 
• Model Name: MiniRevolver 
• Manufacturer Part Number (MPN): 22MGRC 
• Caliber: .22 WMR (Winchester Magnum Rimfire) 
• Action: Single Action Only (SAO) 
• Capacity: 5 Rounds 
• Barrel Length: 1.63 inches 
• Weight: 4.50 ounces 
• Sights: Half Moon 
• Grip Type: Standard Rubber Grip 
• Condition: New in Box 
   

Detailed Features 

The frame and cylinder are stainless steel, which handles carry wear and moisture without special attention. The .22 WMR caliber gives it meaningfully more velocity and energy than .22 LR out of a short barrel. Loading and unloading requires removing the cylinder pin, rotating the cylinder manually, and working each chamber -- it's slow, but the design is simple enough that it rarely malfunctions. 
 

Usage Scenarios 

The Mini Revolver is carried as a last-ditch backup or an ultra-compact pocket gun where a larger firearm isn't practical. It's also used in the field as a snake gun. Sport use is mostly informal plinking given the half-moon sights and 1.63" barrel.

The NAA MiniRevolver .22 WMR draws consistent reactions. Owners almost universally appreciate the size and stainless build -- it is genuinely pocketable in ways that most firearms aren't, and it doesn't rust. Reliability gets good marks; single-action revolvers with no magazine have few ways to fail.

The debates center on practical utility. Detractors point out that .22 WMR from a 1.63" barrel loses a lot of its velocity advantage over .22 LR, and that the single-action requirement slows follow-up shots. The loading process -- cylinder pin removal, manual rotation -- is awkward under stress. Accuracy at anything beyond contact range is limited by the half-moon sights. Most of the conversation around it acknowledges it's a specialized tool rather than a general-purpose self-defense option.