The FN America FNX is a single/double-action 9mm Luger pistol with a 4-inch barrel, 17-round capacity, and two magazines included. The polymer frame weighs 1.4 lbs (21.9 oz) and the slide is stainless steel with a stainless finish. 
 

Key Specifications 

• Manufacturer: FN America 
• Model: FNX 
• Caliber: 9mm Luger 
• Barrel Length: 4 inches 
• Capacity: 17 rounds (2 magazines included) 
• Weight: 1.4 lbs (21.9 oz) 
• Frame Material: Polymer with a black finish 
• Slide Material: Stainless Steel with a stainless finish 
• Action Type: Single/Double Action 
• Safety Type: Manual safety 
   

Detailed Features 

The exposed hammer allows both double-action first shot and cocked single-action firing. The manual safety adds an external layer of control. Sights are a 1-dot front and 2-dot rear for quick target pickup. The textured polymer grip accommodates various hand sizes. The muzzle is non-threaded. 
 

Usage Scenarios 

• Home defense: 17 rounds of 9mm in a full-size frame. 
• Concealed carry: at 21.9 oz with a 4-inch barrel, it is on the lighter end of full-size pistols. 
• Sport shooting: the SA/DA action and 17-round capacity suit a range of competition formats.

Owner feedback on the FNX 9mm covers several consistent topics.

1. Build Quality and Reliability: The FNX's construction is frequently praised. Owners describe it as durable and reliable across a variety of ammunition types.

2. Ergonomics: The grip shape and texture receive positive comments. Most shooters find it comfortable for extended range sessions or all-day carry.

3. Accuracy: Reports generally point to good accuracy. Groupings at typical defensive distances are described as consistent after a short break-in period.

4. Capacity: The 17-round standard capacity is a selling point for owners who want high capacity without moving to a larger frame.

5. Sights: Factory sights get a split response -- some find them adequate, while others swap them for aftermarket options with higher visibility.

6. Weight and Size: At 21.9 oz it is lighter than many full-size steel-frame pistols, but some buyers find it heavier than other compact polymer options for all-day carry.

7. Price Point: Opinions vary. FN's reputation commands a premium, and some buyers feel the price is justified while others compare it unfavorably to similarly priced Glock or SIG options.

8. Customization Options: Aftermarket support is reasonable -- holsters, grips, and sights are available, though the selection is smaller than for Glock platforms.

9. User Experience: Most owners report overall satisfaction. A small number mention a break-in period for reliable feeding with certain ammunition types.