The Springfield Echelon 4.0FC 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 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 flush magazine, while the billet machined compact slide reduces overall weight and length for improved maneuverability and easier concealment. At just 24 oz. with the 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 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. Mount your preferred optic directly to the slide for a clean, reliable setup. The tritium/luminescent U-Dot sights provide excellent visibility in any light condition 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 4.0FC ships with both a 17-round flush magazine for concealed carry and a 20-round extended magazine for maximum capacity, giving you flexibility based on your mission. A captive recoil system simplifies maintenance, and the black polymer frame with full-size grip module and compact dust cover provid