EGW 1911 Mainspring Housing – GR4 – Blued

EGW 1911 Mainspring Housing – GR4 – Blued

Upgrade your 1911 easily with the EGW GR4 Mainspring Housing, which not only provides a clean, custom look but also improves grip, control, and overall handling. Moreover, the straight serrations give positive contact across your palm, and when paired with the GR4 Grip Safety, the combination delivers a complete custom aesthetic for your 1911.

Clean, Classic Flat Design

The GR4 housing follows the traditional flat 1911 design, offering a sleek and timeless appearance. Additionally, its straight serrations enhance control without adding bulk. Therefore, whether you’re shooting in competition or carrying daily, your grip remains secure during rapid fire, recoil management, and reloads.

Precision Machined from Solid Barstock Steel

EGW fully machines this mainspring housing from solid steel barstock, which ensures long-lasting durability and structural strength. Furthermore, the blued finish adds corrosion resistance while maintaining a professional, classic look. As a result, your 1911 not only performs better but also looks refined and well-crafted.

Drop-In Installation for Full-Size Pistols

The GR4 Government Model housing installs quickly and easily in all full-size 1911 pistols, including Para-Ordnance models such as the P-14 and P-16. Consequently, you can upgrade your firearm immediately without the need for custom fitting or gunsmithing adjustments. This ease of installation saves both time and effort, allowing you to focus on shooting rather than setup.

Ideal Replacement for Plastic Housings

Many factory pistols come with lightweight polymer mainspring housings. By upgrading to this steel GR4 housing, you add rearward weight for better balance and a more solid feel. In addition, it serves as a reliable replacement for worn or damaged factory housings while maintaining your pistol’s classic style. Ultimately, this upgrade enhances both handling and overall shooting confidence.

Compatibility

Fits:

• 1911 Government frames

• 1911 Commander frames

• Full-size Para-Ordnance pistols

Does NOT fit:

• STI frames

• Short-grip frames

Specifications

• Material: Solid Barstock Steel

• Finish: Blued

• Profile: Flat with straight serrations

• Manufacturer: EGW (Evolution Gun Works)

Why Choose EGW GR4 Mainspring Housing?

EGW designs and manufactures this mainspring housing entirely in-house, ensuring precise fit, consistent quality, and reliable durability. Moreover, whether you are building a custom 1911 or replacing a worn factory housing, the GR4 provides improved grip, enhanced balance, and a refined, classic appearance—all while offering exceptional value. In addition, its straight serrations and solid steel construction make it a practical upgrade that will last for years of shooting.