The North American Arms Rule 1 is a single-action mini revolver chambered in .22 Magnum with a 1-5/8-inch barrel. It holds 5 rounds and is fitted with XS sights. The frame and barrel carry a stainless finish. 
 

Key Specifications 

• Brand: North American Arms 
• Model: Rule 1 
• Caliber: .22 Magnum 
• Action: Single Action 
• Capacity: 5 
• Barrel Length: 1.62 in 
• Color/Finish: Stainless 
   

Detailed Features 

• 1-5/8-inch barrel in stainless finish 
• XS sights 
• 5-round cylinder 
• Single action mechanism 
• Hamre grip

Owners of the North American Arms Rule 1 generally purchase it as a deep-concealment backup, and most report it fills that niche well. The stainless finish holds up to pocket carry, and the single action mechanism is considered intuitive for a firearm of this size.

The XS sights on the Rule 1 are frequently mentioned as a step up from the simple notch on other NAA mini revolvers. Owners who have used previous NAA variants consider the sights a meaningful upgrade for aimed fire at close range, though the short sight radius limits precision at distance.

The .22 Magnum chambering draws the predictable debate on effectiveness for a backup role. Owners who accept its limitations focus on the Rule 1's near-disappearing profile and consistent mechanical reliability as the primary advantages.