The FN America FN 545 MRD is a full-size semi-automatic pistol chambered in .45 ACP with a 4.4-inch barrel and a 15-round magazine capacity. It ships in black with an optic-ready MRD (Micro Red Dot) slide cut and comes with two 15-round magazines. A compensator variant (MRD Comp) is also available under this model line. 
 

Key Specifications 

• Brand: FN America 
• Model: FN 545 MRD 
• Caliber: .45 ACP 
• Action: Semi Auto 
• Capacity: 15 rounds 
• Barrel Length: 4.4 in 
• Color/Finish: Black 
   

Detailed Features 

• Micro Red Dot (MRD) optic-ready slide cut 
• Ships with two 15-round magazines 
• Available in standard and compensated (MRD Comp) configurations 
• Full-size .45 ACP platform 
• Black finish

Owners of the FN 545 MRD in black focus first on the 15-round capacity in .45 ACP, which sets it apart from single-stack .45 designs. The two-magazine inclusion at purchase is consistently noted as a practical value point. The MRD slide cut draws appreciation from owners who run red dot optics, since it eliminates the aftermarket milling step.

The FN 545's grip width generates the most friction in owner discussions. Shooters with larger hands find it comfortable; those with smaller hands mention the grip circumference requires adjustment, especially for reaching the magazine release cleanly. Recoil management in .45 ACP gets mixed marks, with some owners finding the platform soft-shooting for the caliber and others noting the full-size frame absorbs energy well but adds carry weight.

Trigger feel is where the FN 545 MRD earns consistent praise. Owners describe it as crisp with a short reset compared to similar full-size .45 options. The compensator variant splits opinion on whether the added length is worth the recoil reduction benefit for the typical shooter's use case.