FN | FN 509C Magazine | 9mm

FN's factory 509C magazine is heat‑treated stainless steel with a black finish, backed by a steel wire internal spring and anti‑tilt polymer follower for the same flawless feeding the full‑size 509 is known for. A polymer extension sleeve integrates cleanly with the pistol's frame for snag‑free carry, and the whole magazine is precision‑engineered for a genuinely snug, wobble‑free fit rather than the play some aftermarket mags have. Cross‑compatible with the larger‑capacity 17- and 24‑round 509 magazines when you want more rounds than the Compact's own mag holds.