The Springfield Armory Echelon 4.0FC Handgun seamlessly bridges the gap between concealable handling and standard duty-grade capacity. Built on a serialized, self-contained Central Operating Group (COG) stainless steel chassis, this innovative platform delivers unparalleled modular adaptability across different frame configurations. The 4-inch hammer-forged steel barrel and compact, billet-machined slide are fully treated in a rugged Melonite finish to provide superior field durability. Its revolutionary Variable Interface System (VIS) allows shooters to direct-mount a massive selection of popular red dot optics footprints without the need for adapter plates. Complete with high-visibility tritium U-Dot sights, a full-size control grip module, and both 17-round and 20-round steel magazines, this crossover layout ensures relentless tactical control.