The NAA MiniMaster is a single-action .22 WMR revolver built around a stainless steel frame and a 4-inch barrel. At 10.80 oz (0.7 lbs) and 7.88 inches overall, it's genuinely pocket-sized without dropping to a useless caliber. 
 

Key Specifications: 

• Model Name: MiniMaster 
• Brand: NAA (North American Arms) 
• Caliber: .22 WMR 
• Action Type: Single Action Only (SAO) 
• Capacity: 5 rounds 
• Barrel Length: 4 inches 
• Overall Length: 7.88 inches 
• Weight: 10.80 oz (0.7 lbs) 
• Sights: Adjustable Marble Arms Front & Rear 
• Grip Type: Black Finger Grooved Rubber 
• Finish: Stainless Steel 
   

Detailed Features: 

The stainless frame holds up to corrosion well, and the adjustable Marble Arms sights give you a real aiming setup rather than the fixed half-moon notch found on NAA's smaller models. That makes it usable for deliberate range work or small game hunting at modest distances. 
 
The finger-grooved rubber grip fills the hand reasonably well for the size. Operation is exposed-hammer single-action: cock, then fire. Straightforward. 
 
At just over half a pound, it works as a backup sidearm or for concealed carry where minimizing bulk matters most. 
 

Usage Scenarios: 

The 4-inch barrel and adjustable sights make this a credible choice for target practice, small game like squirrels, or trail carry where weight is the overriding concern. Recoil in .22 WMR is manageable, and the 5-round capacity fits the format.

The NAA MiniMaster generates fairly predictable discussion among rimfire revolver owners.

Compactness and light weight come up constantly as genuine advantages, especially for those who carry it as a backup or on trail trips. The stainless steel construction gets consistent marks for holding up over time.

The .22 WMR caliber divides opinion. Some owners appreciate the lower recoil and the relative affordability of the ammunition; others question its stopping power in a defensive role and treat it primarily as a plinking or small-game gun. That debate never fully resolves.

Accuracy at short range is generally rated positively, though owners note the miniaturized sights take some practice to use well. Trigger pull feedback varies: some find it acceptable, others describe it as heavy or stiff. The price is viewed as fair for the quality, though occasionally compared unfavorably to alternatives at a similar price point.