The Iver Johnson 1911 Mainspring Housing delivers a robust, steel blued flat mainspring housing designed to enhance reliability and grip for 1911 enthusiasts, featuring vertical serrations for consistent handling. Built to fit Government and Commander size 1911 frames, this mainspring housing accepts standard internal components, though fitting may be required to ensure a precise, secure installation, and it does not include internal parts. Crafted from durable steel with a black oxide finish, it combines rugged longevity with a classic look suitable for both field use and range work. The housings compact dimensions (approximately 2.30 by 2.30 by 5.85 inches) and compatible profile support smooth holstering and dependable cycling during high-stress shooting scenarios, making it a practical upgrade for anyone seeking to refine grip geometry and overall pistol ergonomics in .45 ACP configurations. With the Iver Johnson branding, this mainspring housing aligns with traditional workmanship while delivering the modern performance demands of competitive shooting, hunting, and duty-style practice. Enhance your 1911 platform with a trusted, steel-constructed mainspring housing designed to endure demanding use and deliver consistent trigger feel across varied shooting sessions.