The FN 545 MRD is a semi-automatic pistol chambered in .45 ACP with a 4.4-inch barrel. It is finished in black and includes two 10-round magazines. The MRD designation indicates it has an optics-ready cut for direct red dot mounting. 
 

Key Specifications 

• Brand: FN 
• Model: 545 MRD 
• Caliber: .45 ACP 
• Action: Semi Auto 
• Capacity: 10 
• Barrel Length: 4.4 in 
• Color/Finish: Black 
   

Detailed Features 

• Optics-ready cut (MRD) for direct red dot mounting 
• 4.4-inch barrel 
• Includes 2 ten-round magazines 
• Black finish throughout

FN 545 MRD owners frequently point to the optics-ready platform as the primary reason for choosing it over other .45 ACP options. The direct-mount red dot cut is a practical feature that most owners take advantage of, and the pistol's ergonomics in .45 ACP are generally well regarded for a full-size service pistol. Build quality comments lean positive, consistent with FN's reputation for tight tolerances.

The two included magazines are a welcome practical touch that owners note positively. Recoil management in .45 ACP is described as manageable rather than light, and some shooters moving from 9mm note a more deliberate follow-up shot cadence. The trigger receives mixed feedback; many owners find it adequate out of the box, while others feel it lacks the crispness of some competitors at the same price.

At its price point the 545 MRD is viewed as a premium offering, and most owners justify the cost through the build quality and optics-ready configuration. A minority find the .45 ACP chambering limiting compared to higher-capacity alternatives, but for those committed to the cartridge the FN 545 MRD is generally considered a solid execution of the platform.