The FNX-45 by FN America is a semi-automatic handgun chambered in .45 ACP with a double/single action trigger. It holds 15+1 rounds, has a 4.5-inch barrel, and weighs 33.2 oz. The Flat Dark Earth frame with black slide finish gives it a two-tone look. 
 

Key Specifications 

• Model: FNX-45 
• Caliber: .45 ACP 
• Action: Double/Single Action (DASA) 
• Capacity: 15+1 rounds 
• Barrel Length: 4.5 inches 
• Weight: 2.1 lbs (33.2 oz) 
• Finish Color: Flat Dark Earth Frame with Black Slide 
• Grip Material: Polymer with interchangeable backstraps 
• Safety Features: Fully ambidextrous decocking lever 
   

Detailed Features 

1. Cold Hammer-Forged Barrel: Contributes to long-term durability and consistent accuracy. 
2. Polished Chamber & Feed Ramp: Promotes reliable feeding and ejection. 
3. Ambidextrous Controls: The decocking/safety lever, slide stop lever, and magazine release all work for both right- and left-handed shooters. 
4. Interchangeable Backstraps: Three sizes let you match the grip to your hand. 
5. MIL-STD Rail: Accepts lights and lasers directly under the barrel.

The FNX-45 Tactical draws consistently positive feedback, though with a few recurring notes of caution.

Users frequently cite the ergonomics as a highlight. The grip texture holds well even in wet conditions, and the ambidextrous controls are appreciated especially by left-handed shooters who don't have to compromise their technique. The .45 ACP chambering gets credit for reliable stopping power, and most owners find accuracy and cycling dependable over extended use.

On the other side, weight comes up regularly. At 33.2 oz, it's on the heavier end for an all-day carry gun, and some find that fatiguing. Magazine capacity isn't often a complaint given the caliber, but a handful of users note that higher-capacity alternatives in other calibers are worth considering if round count matters.