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Home Handgun Parts Safety Parts Safeties HARRISON DESIGN & CONSULTING 1911 EXTREME SERVICE THUMB SAFETY Support
Enhance your 1911 with the Extreme Service Thumb Safety 🛡️. Ergonomically designed for comfort and reliability during extended use.

HARRISON DESIGN & CONSULTING 1911 EXTREME SERVICE THUMB SAFETY

100013878

Variations:

Enhance your 1911 with the Extreme Service Thumb Safety 🛡️. Ergonomically designed for comfort and reliability during extended use.
HARRISON DESIGN & CONSULTING 1911 EXTREME SERVICE THUMB SAFETY STAINLESS STEEL
104.9 GBP 2 £104.90 *
In stock
Finish: Stainless Steel Make: 1911 Model: Government, Commander, Officers Style: Thumb
In stock
104.9 GBP 2 £104.90 *
Ask question
Upgrade your 1911 with the Extreme Service Thumb Safety! ✨ Ergonomically designed for comfort and reliability during extended use.
HARRISON DESIGN & CONSULTING 1911 EXTREME SERVICE THUMB SAFETY BLUED
109.9 GBP 0 £109.90 *
Reordered
Finish: Blued Make: 1911 Model: Government, Commander, Officers Style: Thumb
Reordered
109.9 GBP 0 £109.90 *
Ask question
Upgrade your 1911 with the Extreme Service Thumb Safety! 🔒 Ergonomically designed for comfort and reliability during extended use.
HARRISON DESIGN & CONSULTING TAC SS EXTENDED THUMB SAFETY
104.9 GBP 0 £104.90 *
Reordered
Finish: Stainless Steel Make: 1911 Model: Government, Commander, Officers Style: Thumb
Reordered
104.9 GBP 0 £104.90 *
Ask question
Upgrade your 1911 with the Extreme Service Thumb Safety! 🔒 Ergonomically designed for comfort and reliability during extended use.
HARRISON DESIGN & CONSULTING TAC BLACK EXTENDED THUMB SAFETY
119.9 GBP 0 £119.90 *
Reordered
Finish: Black Make: 1911 Model: Government, Commander, Officers Style: Thumb
Reordered
119.9 GBP 0 £119.90 *
Ask question
104.9 119.9 4 GBP
104.9 GBP 2 £104.90

Prices inclusive of duty & VAT.

Product no.: 100013878

Mfr Part: HD452

The Extreme Service thumb safety is the result of years of design and testing to develop a thumb safety that is ergonomically comfortable, rugged in construction and offers unique features that solve many of the problems with existing designs. The thumb shelf has an arced shape that is sculpted to meet the "plate" portion of the safety. The shelf is lowered slightly and rotated on the plate to better match up to the human hand. This makes the safety more comfortable in use over extended firing sessions. The positioning of the thumb shelf also helps keep the palm of your hand in deeper, more solid contact with the grip safety, so it's less likely that you'll have a failure to get the grip safety depressed and then keep it depressed, which could render your pistol unfireable at the worst time. The plate is made thicker than most other brands and is configured so that the safety plunger bears fully on the front of the plate, eliminating side thrust loading from being exerted against your plunger tube which can eventually loosen the tube’s mounting, allowing the plunger pin to climb over the safety's plate, potentially rendering the gun unfireable. An ample detent pocket and radius give a positive "click" as you move the safety on and off. The pivot shaft joins the plate with a generous radius which is crucial to prevent stress breakage of the plate/shaft joint as found on other brands. The blocking lug has an extra fitting pad on the rear of the lug allowing the gunsmith to regulate how far down the thumb safety can swing, which keeps the safety's plate from overhanging the edge of the frame. An industry first! The rear edge of the plate is beveled and blended where it meets the back edge of the frame, a feature lacking on other brands. Looks great and a complimentary design to the Harrison Design Extreme Service Slide Stop. On HD453 and HD454 the narrowed thumb shelf has an arced shape that is scuplted to meet the "plate" portion of the safety. The shelf is lowered slightly and rotated on the plate to better match up to the human thumb. This makes the safety more comfortable in use over extended firing sessions.
In stock
6

Delivery time approx. 7-14 days.
2 pcs. in the USA warehouse

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Delivery time approx. 7-14 days.
2 pcs. in the USA warehouse

Wish List Ask question

Variations:

Enhance your 1911 with the Extreme Service Thumb Safety 🛡️. Ergonomically designed for comfort and reliability during extended use.
HARRISON DESIGN & CONSULTING 1911 EXTREME SERVICE THUMB SAFETY STAINLESS STEEL
104.9 GBP 2 £104.90 *
In stock
Finish: Stainless Steel Make: 1911 Model: Government, Commander, Officers Style: Thumb
In stock
104.9 GBP 2 £104.90 *
Ask question
Upgrade your 1911 with the Extreme Service Thumb Safety! ✨ Ergonomically designed for comfort and reliability during extended use.
HARRISON DESIGN & CONSULTING 1911 EXTREME SERVICE THUMB SAFETY BLUED
109.9 GBP 0 £109.90 *
Reordered
Finish: Blued Make: 1911 Model: Government, Commander, Officers Style: Thumb
Reordered
109.9 GBP 0 £109.90 *
Ask question
Upgrade your 1911 with the Extreme Service Thumb Safety! 🔒 Ergonomically designed for comfort and reliability during extended use.
HARRISON DESIGN & CONSULTING TAC SS EXTENDED THUMB SAFETY
104.9 GBP 0 £104.90 *
Reordered
Finish: Stainless Steel Make: 1911 Model: Government, Commander, Officers Style: Thumb
Reordered
104.9 GBP 0 £104.90 *
Ask question
Upgrade your 1911 with the Extreme Service Thumb Safety! 🔒 Ergonomically designed for comfort and reliability during extended use.
HARRISON DESIGN & CONSULTING TAC BLACK EXTENDED THUMB SAFETY
119.9 GBP 0 £119.90 *
Reordered
Finish: Black Make: 1911 Model: Government, Commander, Officers Style: Thumb
Reordered
119.9 GBP 0 £119.90 *
Ask question

Description:

The Extreme Service thumb safety is the result of years of design and testing to develop a thumb safety that is ergonomically comfortable, rugged in construction and offers unique features that solve many of the problems with existing designs. The thumb shelf has an arced shape that is sculpted to meet the "plate" portion of the safety. The shelf is lowered slightly and rotated on the plate to better match up to the human hand. This makes the safety more comfortable in use over extended firing sessions. The positioning of the thumb shelf also helps keep the palm of your hand in deeper, more solid contact with the grip safety, so it's less likely that you'll have a failure to get the grip safety depressed and then keep it depressed, which could render your pistol unfireable at the worst time. The plate is made thicker than most other brands and is configured so that the safety plunger bears fully on the front of the plate, eliminating side thrust loading from being exerted against your plunger tube which can eventually loosen the tube’s mounting, allowing the plunger pin to climb over the safety's plate, potentially rendering the gun unfireable. An ample detent pocket and radius give a positive "click" as you move the safety on and off. The pivot shaft joins the plate with a generous radius which is crucial to prevent stress breakage of the plate/shaft joint as found on other brands. The blocking lug has an extra fitting pad on the rear of the lug allowing the gunsmith to regulate how far down the thumb safety can swing, which keeps the safety's plate from overhanging the edge of the frame. An industry first! The rear edge of the plate is beveled and blended where it meets the back edge of the frame, a feature lacking on other brands. Looks great and a complimentary design to the Harrison Design Extreme Service Slide Stop. On HD453 and HD454 the narrowed thumb shelf has an arced shape that is scuplted to meet the "plate" portion of the safety. The shelf is lowered slightly and rotated on the plate to better match up to the human thumb. This makes the safety more comfortable in use over extended firing sessions.  

Top takeaways

  1. The Extreme Service thumb safety is ergonomically designed for comfort and prolonged use, with a thumb shelf that matches the human hand and ensures proper grip safety engagement.
  2. It features a robust construction with a thicker plate to prevent side thrust on the plunger tube, a positive "click" detent, and a stress-resistant pivot shaft to enhance durability.
  3. The safety includes unique design elements like an adjustable blocking lug for fitting precision and beveled edges for a seamless frame integration, complementing the Harrison Design Extreme Service Slide Stop.

Attributes

  • Finish: Stainless Steel
  • Make: 1911
  • Model: Commander,Government,Officers
  • Style: Thumb
  • Delivery weight: 0.018kg
  • Shipping height: 6mm
  • Shipping width: 91mm
  • Shipping length: 142mm

Item details

Made in USA
US export classification: 0A501.x

Customers reviews

Customer ratings (6)

5 / 5
Definitely recommended

Brownells USA Harrison Parts are phenomenal 21/05/2016

If you know how to properly fit a thumb safety then buy this. If you do not know how to do it safely, buy it and have a gun smith install it. Matched my blackened Colt Rail Gun finish perfectly. No rattle, perfect function after removing material. I expected to have to fit the safety and it was easy. Very very solid.Clicks definitively on and off. Will be ordering other Harrison products shortly.

Definitely recommended

Brownells USA Good design & ergonomics. 10/05/2015

Installed on a 2010 Dan Wesson CCO. Required a good bit of fitting on the sear engagement face, but that's normal and expected for 1911 fire control parts. Results were great -- I really like the ergonomics, and the detent tension is perfect.



I really like the design. Had similar excellent results with the stainless version on a Colt 1070 XSE.

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