The Springfield Armory(R) 1911 Ronin AOS is a single action pistol chambered in 45 ACP featuring a 4.25-inch barrel and a 8-round magazine. This configuration features a Blued/Satin Aluminum finish.Key Features:Caliber: 45 ACP.Action: Single Action.Barrel Length: 4.25 inches.Capacity: 8+1.Barrel: Hammer Forged Stainless Steel; Match Grade.Finish: Blued/Satin Aluminum.Sights: Fiber Optic Sights.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.