Springfield Echelon 4.0 FC, Semi-automatic, Striker Fired, Polymer Framed Pistol, Full Size, 9MM, 4 Barrel, Melonite Finish, Black, Optics Ready Slide, Front Tritium Night Sight, Tactical Rack U-Dot Rear, 10 Rounds, 2 Magazines EC9409BFCLC-U Engineered to merge full-size capacity with a compact slide assembly, the Echelon 4.0FC pairs a 4-inch barrel with a full-length grip. At its core is Springfield's Central Operating Group, providing a serialized foundation for modular performance. The revolutionary Variable Interface System enables direct-mount compatibility with a wide range of today's leading optics. Fully ambidextrous and equipped with tritium/luminescent U-Dot sights, the 4.0FC delivers duty-grade capacity with fast handling in a balanced, do-it-all platform.