The FN 510 MRD Compensated is a striker-fired semi-automatic pistol chambered in 10mm Auto. It has a 4.43-inch cold hammer forged barrel fitted with a factory compensator, an optics-ready serrated slide, and ships with two 10-round magazines. 
 

Key Specifications 

• Brand: FN 
• Model: 510 MRD Compensated 
• Caliber: 10mm Auto 
• Action: Semi Auto, striker-fired 
• Capacity: 10+1 
• Barrel Length: 4.43 in 
• Overall Length: 8.30 in 
• Frame Material: Polymer 
• Finish: Flat Dark Earth 
   

Detailed Features 

• Optic-ready, serrated slide in stainless steel with a Flat Dark Earth PVD finish 
• Threaded barrel (.578x28) fitted with a factory compensator to manage muzzle rise 
• Ambidextrous controls and an interchangeable backstrap grip for hand-size fit 
• Drift-adjustable black iron sights that co-witness with a red dot 
• Ships with two 10-round magazines and a 6-pound trigger pull

Shooters who pick up a 10mm pistol like the FN 510 usually comment on the recoil first: 10mm Auto snaps harder than 9mm, and the added weight of a full-size polymer-frame gun with a factory compensator like this one is generally credited with taming a lot of that impulse. FN's reputation for solid slide-to-frame fit carries over from their other 500-series pistols, and most people find the trigger and general build quality competitive with other major handgun makers.

Optic-ready slides are now expected on a duty or range gun in this class, and owners tend to like being able to co-witness the factory sights with a red dot rather than buying a plate system separately. The ambidextrous controls and interchangeable backstrap make the grip easy to size for different hands, though some shooters with smaller hands still find a compensated 10mm a lot of gun to manage on a first outing.

On value, FN pistols sit toward the upper end of the striker-fired market, and buyers weigh that against the included accessories, like two magazines and the ambidextrous features, when deciding if it is worth the premium. Aftermarket holster support for the 510 line lags behind more established platforms, which is the most common complaint once people move past the range and look at daily carry or duty gear.