The NAA Mini-Master is a single-action .22 LR / .22 WMR revolver with a stainless steel frame and a rosewood birdshead grip. It measures 5.13 inches overall and weighs 6.5 oz (0.4 lbs), with a 1.63-inch barrel and 5-round capacity. 
 

Key Specifications 

• Caliber: .22 LR / .22 WMR 
• Capacity: 5 rounds 
• Barrel Length: 1.63 inches 
• Overall Length: 5.13 inches 
• Weight: 6.5 ounces (0.4 lbs) 
• Sights: Bead Front / Half-moon Sight 
• Action Type: Single Action Only (SAO) 
• Grip Material: Rosewood Birdshead 
• Frame Material: Stainless Steel 
• Condition: New in Box 
   

Detailed Features 

The stainless steel frame resists corrosion, important for a gun that may spend time in a pocket or on a belt through varied weather. The rosewood birdshead grip is more than visual -- it fills the hand better than NAA's standard grip panels and helps with control on a gun this light. 
 
The dual-caliber setup requires a cylinder swap to switch between .22 LR and .22 WMR. Single-action operation means cocking the hammer before each shot; at this size, that's the most practical mechanism for a reliable trigger pull. 
 

Target Audience 

Anyone who needs the smallest possible carry option: a backup gun for people who already carry a primary, or a trail gun for hikers and campers who want light defense without bulk. Also appeals to collectors who appreciate NAA's unusual design history. 
 

Usage Scenarios 

• Deep concealment carry where a larger gun isn't practical. 
• Trail use during hiking or camping. 
• Casual target practice with .22 LR to keep cost and recoil low.

The NAA Mini-Master gets consistent praise for its size, build quality, and dual-caliber flexibility. Owners value the stainless construction for durability and the rosewood birdshead grip for better purchase than earlier NAA grip options. The compact form factor is its main draw, and people who buy it for that reason are generally satisfied.

On the practical side, accuracy at close range is fine; past 15-20 yards, the short barrel and small sights become limiting. Trigger pull opinions vary -- some find it smooth for a SAO this small, others feel it's heavier than expected. The 5-round capacity is a common discussion point, with users divided on whether it's adequate for its intended use as a backup or last-resort piece.

The .22 WMR cylinder option adds appeal for people who want a bit more velocity and energy than .22 LR provides. Overall, owners who understand the Mini-Master's niche -- a very small, very light, stainless SAO backup -- rate it well.