The Springfield Armory(R) Echelon 4.0FC COA is a semi auto pistol chambered in 9mm Luger featuring a 4-inch barrel and a 20-round magazine. This configuration features a Black finish.The 4.0FC configuration pairs a compact slide with a full-length grip and a factory-mounted Aimpoint COA optic.Key Features:Caliber: 9mm Luger.Action: Semi Auto.Barrel Length: 4 inches.Capacity: 20+1.Barrel: Hammer Forged Steel; Melonite Finish; 1:10 Twist.Finish: Black.Sights: Fixed Sights.Includes: One 17-Round Magazine; One 20-Round Magazine; Aimpoint COA Optic; Handgun Case.Springfield 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.