FN 502 MRD 4″ .22 LR CA Compliant Optic-Ready Pistol

The FN 502 MRD is a .22 LR optic-ready rimfire pistol patterned after the FN 509, designed for low-cost range work and high-round-count training. It features a 4-inch target-crowned barrel and a polymer frame with an integrated Picatinny rail for accessories. Ambidextrous controls and FN 509-inspired ergonomics provide familiar handling for users transitioning from full-size service pistols.

Key Specifications

• The caliber is .22 LR.
• The barrel length is 4 inches and includes a target-crowned muzzle.
• The slide is optics-ready to accept red-dot sights.
• The frame is black polymer with an integrated Picatinny accessory rail.
• The package includes two 10-round magazines.
• The trigger break is specified at 5 pounds (factory specification).
• The slide uses aircraft-grade anodized aluminum and steel construction.
• Controls are ambidextrous and a manual safety is provided.
• The barrel twist rate is 1:16 RH.
• The sight radius measures 5.5 inches.

Built to provide an optics-capable rimfire platform with service-pistol ergonomics, the FN 502 MRD suits affordable range sessions and deliberate training where consistent handling and easy sight mounting matter. Its compact footprint and accessory-ready frame make it a practical choice for users seeking a familiar controllability and straightforward maintenance in a rimfire pistol.