The Springfield Echelon 4.0FC Gear Pac delivers the perfect balance of capacity and agility-full-size grip control paired with a compact slide assembly for fast handling. Variable Interface System optics mounting, Central Operating Group modularity, and duty-grade construction combine to create a versatile platform built for carry, defense, and duty use. The Gear Pac configuration comes ready to run with a factory-installed Viridian RFX11 green dot, four magazines, and a heavy-duty pistol bag. The 4.0FC pairs a full-length grip module with a compact slide assembly, giving you the best of both worlds. The full-size grip provides recoil control and houses a 17-round magazine, while the billet machined compact slide reduces overall weight and length for improved maneuverability and easier concealment. At just 24 oz. with a flush magazine, the 4.0FC is light enough for all-day carry but substantial enough to manage recoil effectively. The 4" hammer forged steel barrel features a Melonite finish and 1:10 twist for accuracy and durability. The factory-installed Viridian RFX11 green dot with Instant-On technology and 30,000-hour runtime provides fast, intuitive aiming right out of the box. The revolutionary Variable Interface System uses movable pins to achieve a low, direct-mount optics solution that eliminates adapter plates and provides an improved sight picture with intuitive alignment. The tritium/luminescent U-Dot sights co-witness with the optic and feature a tactical rack rear for one-handed manipulation. At the heart of the Echelon is the Central Operating Group-a self-contained, serialized chassis that houses the patent-pending operating system. This modular foundation allows for customization and ensures robust, reliable performance. Fully ambidextrous controls make the 4.0FC accessible to all shooters regardless of hand preference. The Gear Pac configuration includes four 17-round magazines, giving you plenty of capacity for training and carry