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1911 Thumb Safety – Standard GI Government Model - Forged AISI 4140 Steel

1911 Thumb Safety – Standard GI Government Model - Forged AISI 4140 Steel

Kensight Sights
SKU:
191-035
|
UPC:
755377191355
Availability:
Ships within one business day.
$58.95
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Current Stock:
99
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Description

1911 Thumb Safety – Standard GI Government Model | Forged AISI 4140 Steel

Built for strength and dependable operation, this 1911 thumb safety is precision machined from a forged AISI 4140 alloy steel blank and heat-treated for long-lasting durability. Forging reshapes the metal under pressure, aligning its internal grain structure to follow the contour of the part, resulting in increased strength and improved resistance to fatigue compared to machined billet components.

The heat-treatment process enhances hardness, toughness, and wear resistance, allowing the part to maintain consistent performance under repeated mechanical stress and cycling.

Designed in a standard Government Model configuration, this thumb safety provides a familiar profile and reliable engagement. The unfinished surface allows for precise gunsmith fitting and custom finishing, ensuring optimal function and a tailored appearance for each build.

Whether upgrading an existing pistol or completing a custom 1911 build, this component delivers dependable operation, proper fitment, and long-term reliability.

Why a Precision Thumb Safety Matters

The thumb safety is a critical control component on the 1911 platform. When engaged, it physically blocks the sear, preventing the hammer from releasing even if the trigger is pulled. This ensures safe handling while maintaining consistent, repeatable engagement during operation.

Key Features

  • Precision machined from forged AISI 4140 alloy steel
  • Forged construction promotes superior strength and fatigue resistance
  • Aligned grain structure enhances durability compared to billet or cast components
  • Heat-treated for improved hardness, wear resistance, and service life
  • Standard Government Model configuration for familiar operation
  • Unfinished surface enables precise fitting and custom finishing
  • Ideal for gunsmithing, repairs, and custom 1911 builds

Material Advantage: Forged AISI 4140 Steel

AISI 4140 is a chromium-molybdenum alloy steel known for its high strength, toughness, and fatigue resistance. It performs reliably in high-stress applications and responds well to heat treatment, allowing manufacturers to achieve a balance of hardness and durability required for critical mechanical components.

Recommended Applications

  • Replacement of worn or factory thumb safeties
  • Precision fitting for custom 1911 builds
  • Performance upgrades for improved reliability and control
  • Professional gunsmithing and firearm restoration projects

 

 

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Authentic Kensight ® Sights - The Professional's Choice

This is an authentic Kensight ® sight, and not to be confused with other brands. When it comes to durability, and features the Kensight® sights far exceed our competitors. Our sights are Wire-EDM machined from a single billet of 4140 chrome-moly steel. The result is a precision sight built with better materials and the Wire-EDM construction ensures the tightest tolerances possible. This translates to ultra-smooth adjustments, audible clicks for both windage and elevation, and consistent dovetail dimensions in which the "industry standard" CNC construction cannot compete. Backed by our Limited Lifetime Warranty, Kensight 1911 sights are premium quality and the first choice for factory-fit OEM manufactures, competition shooters and professional's worldwide.

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Warranty

Limited Lifetime Warranty

We stand behind our products. All Kensight Sights are covered by a limited lifetime warranty. We guarantee our products against defects in material and construction. This limited lifetime warranty does not extend to normal signs of wear. It does not cover breakage, damage or rust due to misuse, improper maintenance, accidents, loss or theft. The warranty does not extend to damages cause by unauthorized repairs.

Any product we determine to be defective will be repaired or replaced solely at our discretion. To receive warranty repair or replacement, the owner must send the product to be evaluated by KFS Industries Warranty Services located at our Atlanta, Georgia headquarters. In addition to the provisions of this warranty, the owner may also have other rights that can vary by state. No other warranties are implied or expressed other than what is specifically stated here.

Warranty Service

All products returned to KFS Industries for a warranty claim must have prior approval of a KFS Customer Service employee in the form of a Return Material Authorization Number (RMA). The RMA must be displayed on the exterior of the return carton. Merchandise returned without an RMA will be refused. The RMA number assigned will expire 30 days from date of issue. To obtain an RMA, please call the KFS Atlanta, Georgia headquarters at (404) 691-7611.

After you obtain your RMA, Please send your product to:

KFS Industries Inc.
875 Wharton Dr SW
Atlanta, GA 30336
 

You must pay the shipping and insurance costs to return your product to KFS Industries Inc., and we will pay the shipping charges to return the product to your US address only. All International shipping will be the responsibility of the consumer.

Upon receipt of a returned product, we will verify warranty coverage. If the product is not covered by warranty, KFS Industries Inc. will send you an estimate of the cost to repair your product prior to performing any services not covered.

Additional Information
Product Series:
1911 Accessories Series
Material:
4140 Chrome Molly Steel
Colour:
Matte Black
Finish:
None
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