EGW 1911 Officer's Mainspring Housing 25 LPI Blue

Product Overview

The EGW 1911 Officer's Mainspring Housing is a premium replacement for Officer-length 1911 frames, including the Colt Defender. Fully machined from solid carbon steel bar stock and finished in blue, this housing provides a durable metal alternative to factory plastic mainspring housings.

The housing features a traditional flat profile with 25 LPI checkering. The checkered rear surface provides positive traction against the palm, helping the pistol stay securely positioned in the hand during recoil.

Because the mainspring housing forms the lower rear portion of the grip frame, replacing a lightweight plastic housing with a machined steel component also adds weight low in the pistol while providing the solid feel of a traditional metal 1911 component.

This product includes the mainspring housing only. Internal pins and springs are not included. Compatible components from your original housing may be reused if they are in good condition, or new Officer-size mainspring housing components can be purchased separately.

Fits 1911 Officer's Models & Colt Defender

This mainspring housing is designed for the shorter grip frame used on Officer-size 1911 pistols.

Compatible applications include:

• 1911 Officer's Model frames
• Colt Defender

The Colt Defender uses the compact Officer-size mainspring housing configuration, making this EGW housing an excellent blued steel replacement or upgrade.

25 LPI Checkering for Positive Grip

The rear face of the mainspring housing features 25 lines-per-inch checkering to provide additional traction against the shooter's palm.

The 25 LPI pattern offers a useful balance between grip and comfort. It provides enough texture to help control the pistol during recoil without creating an unnecessarily aggressive surface for regular range or carry use.

Machined From Solid Carbon Steel Bar Stock

This is EGW's premium Officer-size mainspring housing and is fully machined from solid carbon steel bar stock.

Rather than using a molded plastic housing, the EGW design provides the strength, weight, and solid feel of a machined steel component.

The housing receives a traditional blued finish, making it a natural match for blued pistols and builds using dark controls and frame components.

Flat Mainspring Housing Profile

This housing uses a flat profile, maintaining the straight rear grip contour preferred by many 1911 shooters.

The shape of the mainspring housing contributes to how a 1911 sits in the shooter's hand. For pistols already using a flat Officer-size housing, this EGW component provides a machined steel replacement while maintaining that familiar grip geometry.

A Premium Replacement for Plastic Mainspring Housings

Some 1911 pistols are supplied with polymer or plastic mainspring housings. The EGW carbon steel housing provides a metal replacement for shooters who prefer the feel, weight, and durability of a fully machined component.

• ✔ Fully machined from carbon steel bar stock
• ✔ Fits 1911 Officer's Model frames
• ✔ Fits Colt Defender pistols
• ✔ Traditional blued finish
• ✔ Flat mainspring housing profile
• ✔ 25 LPI checkering for additional traction
• ✔ Metal replacement for factory plastic housings
• ✔ Adds weight low in the grip frame
• ✔ Premium EGW-machined 1911 component

Pins & Springs Are Not Included

This product includes the mainspring housing only. The mainspring, cap, retainer, pins, and other internal components are not included.

Compatible components from your original Officer-size mainspring housing may be reused if they are in serviceable condition, or new Officer-size components can be installed.

Installation & Fitment

This mainspring housing is designed for Officer-size 1911 frames, including the Colt Defender. As with many 1911 components, dimensions can vary slightly between frames and manufacturers.

The housing should fit correctly within the frame rails while allowing proper alignment of the mainspring housing retaining pin and unrestricted operation of the internal mainspring components.

Minor fitting may be required due to manufacturing tolerances between individual pistols.

Frequently Asked Questions

Does this mainspring housing fit the Colt Defender?
Yes. This EGW Officer-size mainspring housing fits the Colt Defender.

Does this fit standard 1911 Officer's Model frames?
Yes. It is designed specifically for Officer-size 1911 frames.

Will this fit a Government or Commander-size 1911?
No. This is an Officer-length mainspring housing. Government and standard Commander-size grip frames use a longer mainspring housing.

Is this mainspring housing flat or arched?
This is a flat mainspring housing.

What checkering does it use?
The rear surface features 25 LPI checkering for additional grip traction.

What is the mainspring housing made from?
It is fully machined from solid carbon steel bar stock.

What finish does it have?
This version has a traditional blued carbon steel finish.

Are the mainspring, pins, and internal components included?
No. This product includes the mainspring housing only. Pins, springs, caps, retainers, and other internal components are not included.

Can I reuse the components from my original mainspring housing?
Yes, provided the original components are compatible and in serviceable condition. New Officer-size mainspring housing components can also be installed.

Does this require fitting?
Minor fitting may be required because 1911 frame dimensions can vary between manufacturers and individual pistols.