The FN 545 Tactical NMS is a striker-fired .45 ACP pistol with a 4.71-inch barrel, FDE finish, and 18+1 round capacity. It weighs 31 oz. (1.9 lbs.) and measures 8.3 inches overall. Two magazines are included: one 15-round and one 18-round. 
 

Key Specifications 

• Brand: FN America 
• Model Name: 545 Tactical NMS 
• UPC: 845737015688 
• Caliber: .45 ACP 
• Action Type: Striker Fired (Double Action) 
• Barrel Length: 4.71 inches  
• Overall Length: 8.3 inches  
• Weight: 1.9 lbs (31 oz) 
• Capacity: 18+1 rounds  
• Finish Color: Flat Dark Earth (FDE) 
• Magazines Included: Two magazines (15-round & 18-round) 
   

Detailed Features 

The Tritium Lamp Steel Dovetail Sights provide a usable sight picture in low-light conditions. Interchangeable backstraps let users fit the grip to their hand size. Controls are ambidextrous, including the slide release and magazine release, which works equally well for left- and right-handed shooters. 
 
The striker-fired double-action mechanism has no external manual safety; safety is built into the trigger system. The 18+1 capacity is unusually high for a .45 ACP full-size pistol and is a notable spec point compared to most competitors in this caliber. The accessory rail accepts lights and lasers.

The FN 545 Tactical in .45 ACP with FDE finish and night sights generates mostly positive feedback, with price and accessories as the main sticking points.

Build quality and the FDE finish draw consistent praise from owners who like the feel and durability. The night sights are specifically called out as useful and well-implemented. Performance comes in well: accurate, good recoil management for .45 ACP, and reliable across reported range sessions.

The 18+1 capacity is a frequent positive highlight -- it's notably higher than most .45 ACP pistols and appeals to buyers who would otherwise move to 9mm for capacity. Ambidextrous controls are appreciated by left-handed shooters.

On the critical side, price is the most common concern -- the FN 545 sits above some comparable options, though most owners think the quality justifies it. Holster and accessory availability is limited compared to more common platforms, which comes up in practical carry discussions. Recoil is described as manageable but more noticeable than lighter calibers, which is expected.