The FN 510 MRD Comp is a striker-fired 10mm Auto pistol with a 4.43-inch cold hammer forged barrel and a built-in compensator. It has a 15+1 capacity, an optic-ready slide, and a polymer frame with interchangeable backstraps. 
 

Key Specifications 

• Brand: FN 
• Model: 510 MRD Comp 
• Caliber: 10mm Auto 
• Action: Striker Fire 
• Capacity: 15+1 
• Barrel Length: 4.43 in 
• Weight: 31 oz 
• Frame Finish: Black 
• Frame Material: Polymer 
• Slide Material: Stainless Steel 
   

Detailed Features 

• Cold hammer forged, threaded barrel (.578x28) with a built-in compensator for muzzle control 
• Optic-ready, serrated slide finished in Black PVD for direct red dot mounting 
• Drift-adjustable black iron sights for backup or co-witness use 
• Ambidextrous controls with interchangeable backstraps for hand-size fit 
• Overall length of 8.30 inches keeps the pistol compact for carry or range use

Owners of the FN 510 MRD Comp tend to focus on how the compensator and 10mm chambering work together, since 10mm typically has stouter recoil than 9mm and the built-in compensator is meant to offset some of that snap. Reception is generally positive on control during strings of fire, though a few shooters note the pistol runs louder and with more muzzle blast than a non-compensated 10mm.

In terms of everyday handling, the optic-ready slide and drift-adjustable iron sights make red dot setups straightforward, and owners appreciate not having to send the slide out for milling. The interchangeable backstraps get mentioned favorably for fitting different hand sizes, especially for shooters coming from other FN or striker-fired polymer pistols.

On durability and value, the polymer frame with a stainless slide is viewed as a fairly standard combination for a full-size 10mm, and most of the discussion around the platform centers on ammunition cost and availability for 10mm rather than complaints about the pistol's construction.