EGW 1911 Mainspring Housing – GR4 – Stainless Steel

EGW 1911 Mainspring Housing – GR4 – Stainless Steel

Upgrade your 1911 with the EGW GR4 Stainless Steel Mainspring Housing, designed to deliver a clean custom appearance while also improving grip, balance, and control. At the same time, its precision-machined construction ensures long-term durability and consistent performance.

Clean Custom Look with Confident Control

The GR4 mainspring housing instantly enhances the look of your pistol. In addition, the straight serrations provide positive contact across the palm of your hand. As a result, your grip feels secure during recoil, rapid fire, and follow-up shots. When paired with the GR4 Grip Safety, the combination creates a seamless, fully custom appearance that stands out without sacrificing function.

Precision Machined Stainless Steel Construction

EGW machines this GR4 mainspring housing from solid stainless steel bar stock, not cast or molded material. Therefore, it offers superior strength, excellent wear resistance, and long service life. Moreover, the stainless finish resists corrosion while maintaining a clean, professional appearance that complements both modern and classic 1911 builds.

Classic Flat Profile for Balanced Handling

The flat housing follows the traditional 1911 design, which many shooters prefer for its clean lines and predictable feel. Consequently, the pistol balances naturally in the hand and tracks consistently during recoil. This design choice makes the GR4 an excellent option for range use, competition, or everyday carry builds.

Easy Drop-In Installation

The Government Model version installs as a drop-in part for full-size 1911 pistols. Likewise, it fits Para-Ordnance double-stack pistols such as the P-14 and P-16. Because of this precise machining, installation remains simple and does not require custom fitting for most builds.

Ideal Upgrade from Plastic Housings

Many factory pistols include polymer mainspring housings. By switching to this stainless steel GR4 housing, you add useful rear weight and a more solid feel. In turn, overall balance improves and the pistol feels more refined and controllable.

Compatibility

Fits:

• 1911 Government frames

• 1911 Commander frames

• Full-size Double-Stack Para pistols

Does NOT Fit:

• STI frames

• Short-grip frames

Specifications

• Material: Solid Bar Stock Stainless Steel

• Finish: Stainless

• Profile: Flat

• Texture: Straight serrations

• Manufacturer: EGW (Evolution Gun Works)

Why Choose EGW?

EGW designs and manufactures this GR4 mainspring housing entirely in-house to ensure consistent quality and precise fit. Furthermore, it costs less than many competing housings that rely on inferior cast construction. Overall, this stainless GR4 housing delivers a clean custom look, improved grip, and dependable performance—making it a smart upgrade for any serious 1911 build.