The Springfield Armory Echelon 4.0FC Low Capacity Handgun is engineered to merge a full-size frame footprint with a highly maneuverable, compact slide assembly. Built around the self-contained, serialized Central Operating Group (COG) stainless steel chassis, this innovative platform enables users to swap the inner core seamlessly across modular grip modules. Its hammer-forged 4-inch steel barrel and recontoured slide are finished with a robust Melonite treatment to provide superior duty-grade protection against field corrosion. The revolutionary Variable Interface System (VIS) allows shooters to direct-mount a massive selection of popular red dot optics footprints low to the slide without relying on clumsy adapter plates. Specially configured to comply with regional capacity boundaries, this layout ships with a high-visibility tritium U-Dot front sight and two 10-round steel magazines.