The Fusion Firearms 1911 Govt SS Plain Steel Mainspring Housing is a Pro-Series upgrade for full-size Government and Commander 1911 frames, CNC machined from solid stainless steel bar stock. Its plain, smooth back and matte stainless finish provide a clean, functional profile that blends easily with a wide range of grips and slide finishes while supporting consistent, reliable mainspring performance.

This mainspring housing is ideal for shooters building, refreshing, or tuning a 1911 for range work, training, or general-purpose carry where a straightforward, no-frills part is preferred. Designed to integrate with most 5-inch Government and Commander-size pistols and their clones, it offers a precise fit that helps maintain a familiar trigger feel and dependable cycling. Fusion Firearms’ attention to machining quality and material integrity makes this a solid choice for long-term 1911 projects.

• Manufacturer: Fusion Firearms
• Model: 1911 Govt SS Plain Steel Mainspring Housing
• Type: 1911 mainspring housing accessory
• Compatible Models: 1911 Government and Commander frames
• Construction: CNC machined from solid stainless steel bar stock
• Back Style: Plain smooth back
• Finish: Matte stainless