EGW 1911 Officer's Mainspring Housing & Magwell Combo 25 LPI Stainless Steel
Quick Check: Fits: Officer's Model 1911s and Colt DefenderProduct: Mainspring Housing & Magwell ComboCheckering: 25 LPIMaterial: Stainless SteelConstruction: Machined from stainless steel bar stockFinish: Glass-Beaded StainlessMagwell Attachment: Precision T-SlotFit: Intentionally snug / slightly oversized for fittingPins & Springs: Not includedSKU: 11422
FITS COLT DEFENDER
This Officer-size mainspring housing and magwell combo also fits the Colt Defender, making it a compact magwell upgrade for both traditional Officer's Model 1911 frames and Defender pistols.
Product Overview
The EGW Premium Officer's Mainspring Housing and Magwell Combo combines a fully machined 25 LPI mainspring housing with a matching stainless steel magwell designed for Officer's Model 1911s and Colt Defender pistols.
Both components are machined from stainless steel bar stock and held to tight tolerances. The mainspring housing incorporates a precision T-slot that accepts the magwell, creating a solid mechanical connection between the two components.
The fit between the mainspring housing and magwell is intentionally tight. In some cases, the magwell may require a light tap with a non-marring hammer to fully seat into the T-slot.
The mainspring housing itself is also manufactured slightly oversized in width. This gives the installer material to work with when fitting the housing closely to the individual frame and helps eliminate unwanted wobble or play once installation is complete.
The rear face features 25 LPI checkering for positive grip traction, while the stainless steel receives a clean glass-beaded finish.
Pins, springs, and internal mainspring housing components are not included. Compatible parts from your original mainspring housing may be reused or replaced with new Officer-size components.
Technical Specifications
SKU: 11422
Platform: 1911
Frame Size: Officer's Model
Additional Fitment: Colt Defender
Component: Mainspring Housing & Magwell Combo
Material: Stainless Steel
Manufacturing: Machined From Stainless Steel Bar Stock
Finish: Glass-Beaded Stainless
Checkering: 25 LPI
Magwell Attachment: T-Slot
Mainspring Housing Fit: Slightly Oversized for Fitting
Pins & Springs: Not Included
Fits Officer's Model 1911s & Colt Defender
This mainspring housing and magwell assembly is designed for the compact grip frame used on Officer-size 1911 pistols.
Compatible applications include:
1911 Officer's Model frames
Colt Defender
OFFICER-SIZE FITMENT
This is an Officer-length mainspring housing and magwell assembly. It is shorter than the components used on standard Government and Commander-size grip frames.
Precision T-Slot Magwell System
The EGW mainspring housing is machined with a T-slot that accepts the matching magwell.
This design mechanically locks the magwell to the mainspring housing and helps prevent the movement or shifting that can occur with looser-fitting assemblies.
The fit between the two pieces is intentionally very tight. Depending on the individual components, a light tap with a non-marring hammer may be required to fully seat the magwell.
T-SLOT FIT IS INTENTIONALLY TIGHT
The magwell is not designed to slide loosely into the mainspring housing. A tight T-slot fit helps create a solid connection between the two parts and minimizes unwanted movement after assembly.
Slightly Oversized for a Tight Frame Fit
The width of the mainspring housing is intentionally manufactured slightly oversized.
This allows the installer to fit the housing closely to the individual frame rather than accepting a loose fit. Once properly fitted, the housing and magwell can sit solidly in the pistol with minimal wobble or play.
Because 1911 frame dimensions can vary between manufacturers and individual pistols, fitting may be required.
25 LPI Checkering
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 provides a balance of positive grip and comfort, making it suitable for both range and carry-oriented Officer-size builds.
Machined From Stainless Steel Bar Stock
Both the mainspring housing and magwell are machined from stainless steel bar stock and held to tight tolerances.
The components receive a glass-beaded stainless finish for a uniform matte appearance that pairs well with stainless pistols and builds using silver or stainless controls.
Why Add a Magwell to an Officer's 1911?
Officer-size 1911 frames use a shorter grip than Government-size pistols. While that compact grip is useful for carry, the smaller magazine opening can make reloads less forgiving.
The EGW magwell adds a larger entrance around the magazine opening to help guide the magazine into the frame during reloads while maintaining the compact Officer-size platform.
Why Choose the EGW Officer's MSH / Magwell Combo?
Fits Officer's Model 1911 frames
Fits Colt Defender pistols
Mainspring housing and magwell included
Machined from stainless steel bar stock
Glass-beaded stainless finish
25 LPI checkering
Precision T-slot magwell attachment
Tight mainspring housing-to-magwell fit
Slightly oversized mainspring housing for close frame fitting
Designed to minimize unwanted movement or play
Premium EGW-machined 1911 components
Pins & Springs Are Not Included
This combo includes the mainspring housing and magwell. The mainspring, mainspring cap, cap pin, retainer, and other internal components are not included.
Compatible components from your original mainspring housing may be reused if they are in serviceable condition, or new Officer-size mainspring housing components may be installed.
INTERNAL PARTS NOT INCLUDED
Pins and springs do not come with this part. You can reuse compatible components from your original mainspring housing or purchase the appropriate Officer's mainspring housing build kit separately.
Installation & Fitment
This mainspring housing and magwell combination is intentionally machined for a close fit and should not be expected to fall freely into every frame.
The mainspring housing is slightly oversized so it can be fitted to the individual frame, and the T-slot connection between the housing and magwell is intentionally snug.
Minor fitting should be expected depending on the dimensions of the individual Officer-size frame or Colt Defender.
FITTING IS PART OF THE DESIGN
The oversized dimensions and tight T-slot connection are intentional. Material may need to be carefully fitted to achieve proper installation in the individual frame. The goal is a solid assembly with minimal wobble or play after fitting.
Frequently Asked Questions
Does this fit the Colt Defender?Yes. This EGW Officer-size mainspring housing and magwell combo fits the Colt Defender.
Does this fit standard Officer's Model 1911 frames?Yes. It is designed for Officer-size 1911 grip frames.
Does this include both the mainspring housing and magwell?Yes. Both pieces are included and are designed to work together as a matched assembly.
How does the magwell attach to the mainspring housing?The mainspring housing has a precision-machined T-slot that accepts the matching magwell.
Why is the magwell difficult to slide into the mainspring housing?The connection is intentionally tight to minimize unwanted movement or play. A light tap with a non-marring hammer may be required to fully seat the magwell.
Why is the mainspring housing oversized?The additional width allows the housing to be fitted closely to the individual frame rather than relying on a loose production fit.
What checkering does it use?The mainspring housing features 25 LPI checkering.
What is the combo made from?Both components are machined from stainless steel bar stock.
What finish does it have?This version has a glass-beaded stainless finish.
Are pins and springs included?No. Internal mainspring housing components are not included.
Will fitting be required?Possibly. The mainspring housing is intentionally slightly oversized and the T-slot fit is intentionally tight. Minor fitting should be expected depending on the dimensions of the individual frame.
INSTALLATION & SAFETY WARNING
WE RECOMMEND THIS MAINSPRING HOUSING AND MAGWELL BE INSTALLED AND CHECKED BY A QUALIFIED AND COMPETENT GUNSMITH. Proper frame fit, mainspring housing pin alignment, magwell seating, grip safety operation, magazine insertion, and complete firearm function should be verified before use.
A Premium Magwell System for Officer's 1911s & Colt Defender
Machined from stainless steel bar stock with 25 LPI checkering, a glass-beaded finish, precision T-slot magwell, and intentionally oversized dimensions for a solid fitted installation, the EGW Officer's Mainspring Housing and Magwell Combo is built for compact 1911 shooters who want a tight, professional-quality setup.
Warning: This product may be alloyed with trace amounts of lead and other elements which are known to the State of California to cause reproductive harm and cancer. To prevent exposure, do not alter the product by welding, grinding, or similar processes. For more information, visit www.P65Warnings.ca.gov.
Location:
1121A Richland Commerce Dr,
QUAKERTOWN
Pennsylvania
18951
