Springfield Armory Echelon 4.0C Compact Optic Ready Gear Pac 9mm Luger 4in Black Melonite Pistol - 15+1 Rounds - Designed to combine full-size capacity with a more compact slide, the Echelon 4.0FC features a 4-inch barrel paired with a full-length grip for enhanced control. At its core is Springfield's Central Operating Group, a serialized fire control unit that supports true modularity across configurations. The Variable Interface System allows for direct mounting of many of today's most popular optics without the need for adapter plates. Fully ambidextrous, the 4.0FC offers duty-level capacity with responsive, well-balanced handling. Its full-size grip helps manage recoil, while the compact, billet-machined slide reduces overall weight for quicker presentation. The result is a versatile platform suited for duty use, personal defense, and everyday carry. Viridian RFX11 Green Dot: A factory-installed Viridian RFX11 green dot with Instant-On technology and 30,000-hour runtime provides fast, intuitive aiming; Pistol Bag: Gear Pac models ship in a heavy-duty nylon zippered case that has storage compartments for your gun and gear; Compact dementions: Shortened at the frame and muzzle, the Echelon 4.0C boasts full-size features in a concealable package; Central Operating Group: The Central Operating Group is self-contained and serialized, providing a robust housing for the patent pending operating system;