The FN FNX-45 is a semi-automatic pistol in .45 ACP with a 4.5-inch cold hammer-forged barrel, a 10+1 capacity, and a polymer frame with a stainless steel slide. It weighs 33.2 oz and measures 7.9 inches overall. The Flat Dark Earth textured grip and matte black slide give it a two-tone appearance. 
 

Key Specifications 

• Brand: FNH 
• Model: FNX-45 
• Caliber: .45 ACP 
• Action: Double Action Only (DAO) 
• Barrel Length: 4.5 inches 
• Overall Length: 7.9 inches 
• Weight: 33.2 oz (2 lbs) 
• Capacity: 10+1 
• Sights: Front - 1 White Dot / Rear - 2 White Dot 
• Grip: Polymer Flat Dark Earth, Textured 
• Safety: Ambidextrous Decocking Lever/Manual Safety 
• Finish: Matte Black 
   

Detailed Features 

 
The cold hammer-forged barrel maintains accuracy through extended use. The polymer frame keeps weight reasonable for a full-size .45 ACP pistol; the stainless steel slide adds durability and corrosion resistance. The ambidextrous decocking lever and manual safety work from either side, which is practical for left-handed shooters. The three-dot white sight system is straightforward and fast to pick up in normal lighting. The textured FDE grip provides a secure hold even in wet conditions. 
 

Usage Scenarios 

 
The FNX-45 is suited for home defense, sport shooting, and duty use where the .45 ACP caliber and 4.5-inch barrel length are appropriate. The DAO action and ambidextrous controls work for both hands without modification.

Owner feedback on the FNX-45 DAO is generally positive, with some recurring practical considerations.

Ergonomics and grip comfort are the most consistently praised features — owners describe it fitting well across different hand sizes, and the FDE textured grip gets specific mention for control during extended shooting sessions. Reliability is a consistent positive; most owners report clean function across different .45 ACP ammunition types. The ambidextrous controls draw appreciation from left-handed shooters and those who value versatility. Build quality with the stainless slide and polymer frame is generally well regarded.

The DAO trigger draws the most mixed feedback — some owners prefer the consistent double-action pull for safety reasons, while others find it heavier and less precise than single-action alternatives, particularly for competition use. Weight at 33.2 oz is on the heavier side for a carry pistol, and the size makes it less suited to concealed carry compared to compact options. The 10+1 capacity draws occasional comment from owners who would prefer higher capacity. Pricing relative to similar .45 ACP options comes up, with most owners considering it justified but noting the real cost.