Springfield Armory(R) Echelon 4.0FC Gear Pac is a compact semi-automatic pistol chambered in 9mm Luger. It features a 4 in barrel with black Melonite finish an optics-ready serrated steel slide and a black polymer grip module with Picatinny accessory rail. This Gear Pac configuration uses a 15-round detachable magazine and features fully ambidextrous controls for adaptable handling.Key Features 4 in barrel with black Melonite finish chambered in 9mm Luger Semi-automatic operation with 15-round detachable magazine Optics-ready serrated steel slide Black polymer grip module with Picatinny accessory rail Fully ambidextrous controls for right- or left-handed operation Gear Pac configuration with additional factory accessoriesSpringfield 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.