The Springfield Armory Echelon 4.0FC Gear Pac delivers premium, duty-ready modularity straight out of the box. Merging the fast-handling nature of a compact 4-inch slide assembly with the uncompromised leverage and control of a full-size frame, this layout mirrors a highly efficient "crossover" footprint optimized for uniform duty and tactical defense. At its core is the serialized Central Operating Group (COG) chassis, giving operators cross-platform flexibility to shift grip modules seamlessly. This bundle comes pre-outfitted with a factory-co-witnessed Viridian® RFX11 green dot optic mounted via the patent-pending Variable Interface System (VIS). The complete Echelon Gear Pac ships protected inside a heavy-duty, padded nylon zippered pistol bag accompanied by an expansive firepower payload of four factory steel magazines (three 17-round flush-fit baselines and one extended 20-round payload).