The Springfield Armory Echelon 4.0FC COA 15-Round serves as the premium crossover hybrid of the modular Echelon family, packaged to optimize duty leverage within capacity-restricted jurisdictions. This specialized layout combines the agile, fast-handling profile of a compact 4-inch slide assembly with the uncompromised leverage and control of a full-size frame grip module. Built directly around the serialized, self-contained Central Operating Group (COG) stainless steel chassis, it features an innovative mechanical marriage between slide and red dot. This exact package arrives factory-equipped with the Aimpoint® A-CUT slide profile, which direct-mounts the included Aimpoint® COA enclosed-emitter red dot sight straight into the metal without the use of intermediate adapter plates. By dropping adapter hardware entirely, the system minimizes height-over-bore measurements and drastically reduces tolerance stacking for premium zero retention. Shipping with two 15-round steel magazines, it maximizes target indexing clarity while maintaining extreme structural durability in the field.