Springfield Armory(R) Echelon 4.0F is a California-compliant semi-automatic pistol chambered in 9mm Luger. It features a 4 in steel barrel with black Melonite finish an optics-ready serrated slide and a black polymer frame with Picatinny accessory rail. This configuration uses a 10-round magazine and features ambidextrous controls for adaptable handling.Key Features 4 in steel barrel with black Melonite finish chambered in 9mm Luger Semi-automatic operation with 10-round magazine capacity Optics-ready slide with serrations Black polymer frame with Picatinny accessory rail California-compliant configuration with ambidextrous controlsSpringfield Armory(R) builds modern firearms that blend proven designs with contemporary features for today's shooters. The brand is known for duty-capable handguns and performance-oriented platforms that support optics lights and high-round-count training. Springfield Armory focuses on practical reliability shooter-friendly ergonomics and consistent value across its lineup.