FN 502 MRD 22 LR 4″ FDE | FN 66102318

The FN 502 MRD is a hammer-fired, optics-ready .22 LR pistol modeled on FN’s full-size ergonomics to deliver a target-style feel in a rimfire platform. It features a 4″ target-crowned barrel, slide cut for micro red dots, and fully ambidextrous controls for consistent handling. This combination makes it well-suited for high-volume practice and precision rimfire training.

Suggested optic: a compact micro red dot like the Holosun 507K pairs well with the MRD platform and stays comfortably under $1000 while providing a low-profile sight picture.

Common applications: range training and rimfire target/competition work.

Product Specifications

• The caliber is .22 LR.
• The operation is Single Action Only (SAO).
• The barrel measures 4 inches and has a target-crowned muzzle.
• The slide is constructed of aircraft-grade anodized aluminum and steel with front and rear cocking serrations.
• The frame features Flat Dark Earth polymer with FN 509-inspired ergonomics and textured grip surfaces.
• The pistol is optic-ready with the FN MRD low-profile optics-mounting system and includes adapters and screws for common micro red dot footprints.
• The package includes two 10-round flush-fit magazines and optic mounting hardware.
• The trigger breaks at approximately 5 lbs per factory specification.
• The sight radius is listed as 5.5 inches.
• The twist rate is specified as 1:16 RH.
• The pistol includes ambidextrous controls and a manual safety.
• The slide features a loaded chamber indicator.
• The muzzle is described as a target crown for improved barrel harmonics.
• The product reference is FN 66102318.
• The UPC is 845737019358.

The FN 502 MRD packs target-oriented features—an optics-ready slide, refined ergonomics, and a crisp factory trigger—into a rimfire platform that makes high-round-count practice economical and enjoyable. Its inclusion of mounting hardware and two flush-fit magazines helps users get on target quickly with commonly available micro red dots. If you value an accurate, ergonomically familiar rimfire for training or competition, the 502 MRD is built to deliver repeatable performance in a compact package.

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