FN 509 with Trijicon RMR & Apex Trigger
MK3 Firearms offers custom optic cuts for pistols, specifically demonstrating an FN 509 with a Trijicon RMR. They emphasize their ability to machine slides for various pistol models to accept red dot sights, cutting as low as possible for optimal sight picture. The service includes cutting the slide to accommodate the user's provided optic.











