The North American Arms Mini-Revolver (Model 22MGBG) is a single-action .22 WMR revolver built for maximum concealment. At 4.6 oz and with a 1.625-inch barrel, it fits in a pocket or waistband without bulk. 
 
Key Specifications 

• Brand: North American Arms (NAA) 
• Model Name: Mini-Revolver (Model Number: 22MGBG) 
• Caliber: .22 WMR 
• Action Type: Single Action (SAO) 
• Capacity: 5 Rounds 
• Barrel Length: 1.625 inches 
• Weight: 4.6 oz 
• Finish: Stainless Steel 
• Sights: Half Moon Sights 
• Grip Type: Standard Boot Grips 
• Condition: New in Box 
   
  Detailed Features 

1. The 4.6 oz weight and 1.625-inch barrel make this among the smallest production revolvers available. 
2. The single-action trigger gives a precise pull for deliberate shots. 
3. Stainless steel construction resists corrosion and holds up to pocket carry over years of use. 
4. Half-moon sights provide a clean, uncluttered sight picture for quick target acquisition. 
5. Standard boot grips are shaped for a secure grip without adding unnecessary bulk. 
    
   The five-round capacity is the practical ceiling for a cylinder this size, and .22 WMR produces more energy than standard .22 LR at the cost of a modest recoil increase, still well within what most shooters find manageable in a revolver this light. 
    
   The NAA Mini-Revolver fills a specific role: it goes places larger handguns cannot, and .22 WMR from a 1.625-inch barrel is credible at close range.

NAA Mini-Revolver .22 WMR discussions tend to focus on the tradeoffs that come with extreme compactness rather than on the gun itself having problems.

The size and weight are the primary draws. Owners report that it carries in a pocket without any noticeable presence, which is the main thing they bought it for. The stainless finish gets consistent positive comments for its durability and the way it holds up in varied carry conditions. The single-action operation is valued by users who appreciate its simplicity and predictable trigger.

The caliber is the most debated aspect. Some owners see .22 WMR in a 1.625-inch barrel as adequate for a last-resort backup or as protection against small wildlife during outdoor activities. Others feel the stopping power is insufficient for primary personal defense and recommend it only as a secondary weapon.

The single-action mechanism also draws criticism in the context of fast defensive use. Having to manually cock the hammer before each shot is a real operational constraint in high-stress situations.

The consensus is clear: the Mini-Revolver is best suited for buyers who need something extremely small and light, understand its limitations, and plan to use it as a backup or niche carry option rather than a primary defensive handgun.