Your basket is empty.

Basket

Help and contact

Free standard delivery over £199

100-day return policy

Newsletter

Sale

Over 300,000 customers - we say thank you!

4.93/5 "Very good" (1400+ reviews)

40,000+ products for hunting and shooting sports

Upgrade your 1911 with Fusion's CNC machined Checkered Steel Mainspring Housing, offering durability and a secure grip in both stainless and black finishes.

FUSION FIREARMS 1911 GOVT BLACK CHECKERED STEEL MAINSPRING HOUSING

100801019

Filters:

Variations

Filters:

Variations:

Upgrade your 1911 with Fusion's CNC machined Checkered Steel Mainspring Housing, offering durability and a secure grip in both stainless and black finishes.

1911 CHECKERED STEEL GOVERNMENT MODEL MAINSPRING HOUSINGS - 1911 GOVT BLACK CHECKERED STEEL MAINSPRING HOUSING

64.9 GBP 0 £64.90 *

Backorderable

Finish: Black Make: 1911 Model: Government, Commander Product no.: 100801019

Backorderable

64.9 GBP 0 £64.90 *

Upgrade your 1911 with Fusion Firearms' CNC machined stainless steel Mainspring Housing, featuring a 20 lpi checkered back for enhanced grip and durability.

1911 CHECKERED STEEL GOVERNMENT MODEL MAINSPRING HOUSINGS - 1911 GOVT SS CHECKERED STEEL MAINSPRING HOUSING

64.9 GBP 0 £64.90 *

Backorderable

Finish: Stainless Make: 1911 Model: Government, Commander Product no.: 100801018

Backorderable

64.9 GBP 0 £64.90 *

64.9 64.9 2 GBP

64.9 GBP £64.90

Prices inclusive of duty & VAT.

Product no.: 100801019

Mfr. No.: 1911-MSH-27-51

Fusion Pro-Series, Stainless steel Mainspring Housing, for Full Size Government size 1911 frames. CNC Machined from Stainless Steel bar-Stock, With 20 lpi Checkered back. Available in stainless matter, or black. Will fit most all 1911 full size 5 inch Government pistols and Commander size pistols and Clones. All CNC machined in the USA,. No MiM, No Cast, ALL Solid CNC Machined Bar-Stock.

Backorderable

10+

£64.90

Prices inclusive of duty & VAT.

10+

Backorderable, delivery time approx. 4-12 weeks from the USA warehouse.

100-Day Return Policy

Backorderable, delivery time approx. 4-12 weeks from the USA warehouse.

100-Day Return Policy

No charges until we ship

No charge:
Your credit card will not be charged when you place your order.

No commitments:
You are under no obligation until the goods are shipped. You can cancel your order at any time before shipping - free of charge.

Not until shipping:
Your credit card will only be charged once we ship your order. Not before.

CNC Machined from Stainless Steel
20 LPI Checkered Back
Fits Most 1911 Models

Wish List Ask question

64.9 64.9 2 GBP

Description Specification Customers reviews Accessories

FUSION FIREARMS 1911 GOVT BLACK CHECKERED STEEL MAINSPRING HOUSING

64.9 GBP £64.90

Prices inclusive of duty & VAT.

10+

£64.90

Prices inclusive of duty & VAT.

10+

Backorderable, delivery time approx. 4-12 weeks from the USA warehouse.

100-Day Return Policy

Description:

Upgrade your 1911 with Fusion's premium checkered mainspring housing!

The Fusion Pro-Series offers a top-quality Stainless Steel Mainspring Housing designed specifically for Full Size Government size 1911 frames. This component is CNC Machined from solid stainless steel bar stock, ensuring durability and precision.

Key Features:

20 lpi checkered back for improved grip
Available in stainless matte or black finishes
Compatible with most 1911 full size 5 inch Government pistols, Commander size pistols, and their clones
Manufactured in the USA with no MiM or cast materials
All solid CNC machined bar stock for enhanced reliability

Specifications:

Designed to fit both the 1911 Government and Commander models, this mainspring housing is an essential upgrade for any serious firearms enthusiast.

Attributes

Finish:
```
Black
```
Model:
```
Commander
```
,
```
Government
```
Weapon type:
```
1911
```
Delivery weight: 0.07kg
Shipping height: 25mm
Shipping width: 102mm
Shipping length: 152mm

Item details

Made in USA
US export classification: 0A501.y.1

Customers reviews

Customer ratings (2)

4 / 5

Recommended with reservations

Could be of better quality 27/03/2017

I gave this product a 3 star base on 2 factors, quality and value.

First off for the same amount of money, i am sure there are better quality MSH out there. When i first got it, i ran my titanium mainspring cap up and down the plunger hole and i could feel the grittiness, so i thought lets put some lube in and install it and see how bad. Well it was fairly bad to the point that i could see the hammer hopping. So i removed it and use the 2000 grit sandpaper on a dowel trick and smooth it out. Reinstall and voila, now the action is smooth.

This product was made at the maximum spec, so there may be fitting required on your frame, mine took about 10 passes on the underside of the 2 ridges for it so that the pin hole lines up at the bottom. Also, the pin hole at the bottom was not reamed out perfectly, what i mean by that is that none of my pins would go in at all, so out comes a round file, 5 passes and now the pin goes freely across.

Definitely recommended

Fusion Main spring housing 04/06/2016

Work excellent for Colt 1911 Model 1991, no additional fitting required. 100% drop in accuracy.

Variations:

1911 CHECKERED STEEL GOVERNMENT MODEL MAINSPRING HOUSINGS - 1911 GOVT BLACK CHECKERED STEEL MAINSPRING HOUSING

64.9 GBP 0 £64.90 *

Backorderable

Finish: Black Make: 1911 Model: Government, Commander Product no.: 100801019

Backorderable

64.9 GBP 0 £64.90 *

1911 CHECKERED STEEL GOVERNMENT MODEL MAINSPRING HOUSINGS - 1911 GOVT SS CHECKERED STEEL MAINSPRING HOUSING

64.9 GBP 0 £64.90 *

Backorderable

Finish: Stainless Make: 1911 Model: Government, Commander Product no.: 100801018

Backorderable

64.9 GBP 0 £64.90 *

Customers also bought

JOHN MASEN

EXTENDED GRAY SLIDE STOP, SR

Slide Catches

2.8

Not available

+ 2 variants

WILSON COMBAT

BLUED FRONT STRAP
1911 CHECKERED FRONT STRAP

Front Straps

Backorderable

£21.90

-4 %

+ 7 variants

Enhance your 1911 with MOE Grip Panels featuring reinforced polymer, anti-slip texture, aggressive magazine release cut-out, and compatibility with ambidextrous safeties.

MAGPUL

1911 GRIPS, FDE
MOE® GRIP PANELS FOR 1911 FULL SIZE

Grips

4.6

Not available

Oops! Something went wrong.

We encountered an error while loading this content. Please refresh the page to continue. If the issue persists, contact our customer support.

Site Navigation

Product Categories

Ordering

Customer Service

Connect

Secure payment methods

Trade Associations

Welcome!

to Brownells UK, your destination for anything gun related. With our roots in a genuine passion for firearms, we bring you an unmatched selection of Gun Parts, Firearm Accessories, Gunsmithing Tools, Scopes & Red Dot Sights and Expert Knowledge.

Whether you're looking to maintain, repair, or upgrade, we've got what you need!

For Shooters, By Shooters
We share your enthusiasm and know exactly what you're looking for because we're part of the community.

Massive Selection
From the essentials to the unique, find everything under one roof.

Our blend of tradition and innovation
Shop with the convenience of modern technology, backed by a legacy of experience.

Browse our collection and discover why we're the trusted name in shooting sports & hunting.