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HARRISON DESIGN & CONSULTING
1911 AUTO HD-120 EXTREME SERVICE IGNITION COMPONENTS

100004374

Description
Ratings (15)

Hardened Tool Steel Components For Durability, Reliability & Precise Fit

Critical ignition parts are machined from high-grade tool steel for precise fit and reliable, consistent function under the most demanding operating conditions. Each component is wire-EDM cut, CNC machined and honed to final dimensions with +/-.005" tolerances for drop-in fit on many 1911s, then heat-treated to Rc 53-56 to maintain those dimensions through thousands of firing cycles. Hammer hooks are pre-prepped and sear nose polished for precise contact and crisp, clean letoff. Commander-style hammer has elongated spur with deep serrations to provide extra-secure thumb purchase. Beveled edges resist snagging on clothing and protect the thumb from abrasion, and slightly narrower hammer body prevents unwanted slide contact. HD-120 set includes hammer, sear, and disconnector. Each component also available separately. HD-120B set features a black IonBond DLC coating on the hammer, for those who prefer the traditional “blued” look combined with wear- and corrosion-resistance similar to hard-chrome.

SPECS: Hardened tool steel, in-the-white. Hardened to Rc 53-56. HD-120B set’s sear has a black IonBond DLC finish. Some fitting may be required.

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Customer ratings for HARRISON DESIGN & CONSULTING HD-120 IGNITION SET

Number of ratings: 15
From brownells.com: 15
Average rating: 4.9

I'm glad I spent the money. (15/06/2013)

The fit, finish and function of this product are outstanding. No additional stoning or polishing was needed for a perfect trigger.

Great product (13/01/2015)

A very good upgrade to my Para Target Elite 1911, only had to ream strut hole , all parts were a drop in. Functions perfect.--- [ also added Wilson 18 Lbs main spring to reduce trigger pull to about 3 Lbs. ]

Very High Quality (10/02/2016)

Excellent quality parts. The hammer is polished and beautifully finish. Nice serrations on the hammer. Not a drop-in part, but not much work required for a great trigger. I used Ed Brown jig and arkansas + ceramic stones for primary and secondary sear angles, and polished the disconnector where it contacts the trigger bow and sear spring. The machining and polish on the hammer hooks was already as exceptional. The fit of the hammer and sear is perfect.

4 pound trigger job with very little work.

works great (17/11/2013)

I bought this for my SR 1911 Ruger Commander. After watching a couple videos online I started the project. Everything dropped in fine except the pin that holds the hammer strut and fitting the thumb safety to the sear. I had the local gunsmith open up the hammer pin hole and I fitted the safety/sear after reading and watching info online. The trigger has no creep and is sharp and crisp at around 5 pounds.

HD120TR EXTREME SERVICE SET TRUE RAD (09/02/2014)

Perfect Installed in S&W "E" 1911 drop in fit 3.5/4.0 trigger , Breaks like a glass rod .

True Radius (21/02/2015)

WOW! Great parts. The true radius sear, makes this trigger job, worth the money. Crisp and not too heavy. It really was what I needed, to replace worn out parts. Everything fit good. The hole for the pin, that holds the hammer spur was tight. I just took the edge off the pin, with some 1000 grit sandpaper, so that I could get it started in.This was a pretty easy job. I recommend that it be done by someone with experience.

Almost too pretty to install (25/03/2017)

Some of the nicest machined parts I've ever seen. Did require fitting of thumb safety as expected. Trigger pull is now one of the best I've ever felt.

<img width="500" src='/userdocs/reviewimages/e505fb7d-3eee-4948-b8f1-65b9f6225963.jpg' alt=''>

Amazing disconnector (13/07/2013)

I was unhappy with the lack of fit and finish on the disconnector in my Kimber Pro Carry II. It was a very rough part. Even after stoning the surfaces, I still wasn't very happy.
I saw that this part had pre-ploished surfaces and decided to check it out.
It's an amazing part. The polished surfaces are silky smooth and the part itself is beautifully machined.
I plan to pick up a few more of these in the future. It's a great part at a great price.

makes a fair drop in (28/01/2018)

good looking part but not made for any of the colts I tried to fit the head is to lose in the port at the pistol I could feel it moving when pulling on the trigger my shooters complained of this and I had to go with EGW I'd rather take of to fit correctly than have a less then drop in part.

Excellent (17/04/2011)

Excellent material and machining,"Watchmakers Grade". Replaced MIM-Junk in a Kimber Ultra II. Almost "drop in", only mainspring strut pin hole had to be reamed a little. Would recommend to everybody who has some mechanical knowledge and tools (anybody else should not mess with ignition parts anyhow, for safety's sake)

Fantastc, a real improvement (02/09/2011)

These parts were a direct drop in improvement to the look and trigger pull on my Colt MKIV Series 80 Gov't Model. The parts are a matching set and there is a dramatic improvement in trigger feel after the install. Super quality and attention to detail in the machining is evident. Parts are in the white, so there is a risk of rust on the hammer after handling or exposure to salty wet environments, if not looked after- but oil wipe-downs go a long way to avert this. No problems thus far after carrying this pistol.

Will buy another set (11/01/2012)

This set was a drop in fit for my RIA M1911A1. I intalled this kit with a new trigger and boy did it make a difference. Less slack and nice crisp break. Money well spent

perfect!! (17/02/2012)

I have a Springfield 1911a1 and this was, for the most part a drop in kit. the frame safety needed some slight filing to function with the new sear. My stock sear,discon.,hammer worked great but it wasn't smooth and solid. this is all that. the only reason I put 4 stars is because it might take slight modification that is'nt advertised in the description.

Excellent compnets (19/02/2012)

Installed these in my GI Expert ESP and what a difference in trigger pull. Parts dropped right in without any modifications. Going to have to buy a set for my Para LTC.

Broken Back can shoot (19/05/2012)

I did cut the angle on the sear with the Ed Brown Sear Jig and cut the back angle. Adjusted the disconector leaf spring and I got a crisp glass breaking 3.25 pound trigger pull. That is what I was looking for on a target 1911. I have tried other manufacture C&S drop in pull kits and feel these are better quality parts. I did have to make same small adjustments to the thumb safety. I would add a 19 pound main spring and install the 1911 AUTO TITANIUM HAMMER STRUT.

Read 15 more ratings on brownells.com

44.9 214.9 5 GBP

Product no.: 100004374
HARRISON DESIGN & CONSULTING HD-120 IGNITION SET
Mfr Part: HD-120 Critical ignition parts are machined from high-grade tool steel for precise fit and reliable, consistent function under the most demanding operating conditions. Each component is wire-EDM cut, CNC machined and honed to final dimensions with +/-.005" tolerances for drop-in fit on many 1911s, then heat-treated to Rc 53-56 to maintain those dimensions through thousands of firing cycles. Hammer hooks are pre-prepped and sear nose polished for precise contact and crisp, clean letoff. Commander-style hammer has elongated spur with deep serrations to provide extra-secure thumb purchase. Beveled edges resist snagging on clothing and protect the thumb from abrasion, and slightly narrower hammer body prevents unwanted slide contact. HD-120 set includes hammer, sear, and disconnector. Each component also available separately. HD-120B set features a black IonBond DLC coating on the hammer, for those who prefer the traditional “blued” look combined with wear- and corrosion-resistance similar to hard-chrome.

209.9 GBP 3 £209.90 *

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

Specs:

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Top takeaways

The 1911 Auto HD-120 Extreme Service Ignition Components are precision-machined from high-grade tool steel for durability and consistent performance.
Components include a hammer, sear, and disconnector that are wire-EDM cut, CNC machined, and honed with tight tolerances for a drop-in fit on many 1911s.
The HD-120 set offers a commander-style hammer with an elongated spur and deep serrations, and the HD-120B set features a black IonBond DLC coating for a traditional look with enhanced wear resistance.

Attributes

Delivery weight: 0.005kg Shipping height: 10mm Shipping width: 76mm Shipping length: 147mm

Item details

Made in USA
US export classification: 0A501.c

Product no.: 100004782
HARRISON DESIGN & CONSULTING EXTREME SERVICE SEAR
Mfr Part: HD-122 Critical ignition parts are machined from high-grade tool steel for precise fit and reliable, consistent function under the most demanding operating conditions. Each component is wire-EDM cut, CNC machined and honed to final dimensions with +/-.005" tolerances for drop-in fit on many 1911s, then heat-treated to Rc 53-56 to maintain those dimensions through thousands of firing cycles. Hammer hooks are pre-prepped and sear nose polished for precise contact and crisp, clean letoff. Commander-style hammer has elongated spur with deep serrations to provide extra-secure thumb purchase. Beveled edges resist snagging on clothing and protect the thumb from abrasion, and slightly narrower hammer body prevents unwanted slide contact. HD-120 set includes hammer, sear, and disconnector. Each component also available separately. HD-120B set features a black IonBond DLC coating on the hammer, for those who prefer the traditional “blued” look combined with wear- and corrosion-resistance similar to hard-chrome.

59.9 GBP 12 £59.90 *

Delivery time approx. 7-14 days.
More than 10 pieces in USA warehouse

Specs: Make: 1911 Model: Government, Commander, Officers

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Product no.: 100004783
HARRISON DESIGN & CONSULTING EXTREME SERVICE DISCONNECTOR
Mfr Part: HD-123 Extreme Service Disconnector

44.9 GBP 6 £44.90 *

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

Specs: Make: 1911 Model: Government, Commander, Officers

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Product no.: 100004781
HARRISON DESIGN & CONSULTING EXTREME SERVICE HAMMER
Mfr Part: HD-121 Extreme Service Hammer

134.9 GBP 2 £134.90 *

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

Specs: Finish: Unfinished Make: 1911 Model: Government, Commander, Officers

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Product no.: 100011124
HARRISON DESIGN & CONSULTING HD-120B IGNITION SET
Mfr Part: HD-120-B Critical ignition parts are machined from high-grade tool steel for precise fit and reliable, consistent function under the most demanding operating conditions. Each component is wire-EDM cut, CNC machined and honed to final dimensions with +/-.005" tolerances for drop-in fit on many 1911s, then heat-treated to Rc 53-56 to maintain those dimensions through thousands of firing cycles. Hammer hooks are pre-prepped and sear nose polished for precise contact and crisp, clean letoff. Commander-style hammer has elongated spur with deep serrations to provide extra-secure thumb purchase. Beveled edges resist snagging on clothing and protect the thumb from abrasion, and slightly narrower hammer body prevents unwanted slide contact. HD-120 set includes hammer, sear, and disconnector. Each component also available separately. HD-120B set features a black IonBond DLC coating on the hammer, for those who prefer the traditional “blued” look combined with wear- and corrosion-resistance similar to hard-chrome.

214.9 GBP 3 £214.90 *

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

Specs:

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Upgrade your 1911 with the HD-120 Extreme Service Ignition Set 🔧. Precision machined for reliability and performance in demanding conditions.

Description
Ratings (15)

Hardened Tool Steel Components For Durability, Reliability & Precise Fit

SPECS: Hardened tool steel, in-the-white. Hardened to Rc 53-56. HD-120B set’s sear has a black IonBond DLC finish. Some fitting may be required.

More...

Customer ratings for HARRISON DESIGN & CONSULTING HD-120 IGNITION SET

Number of ratings: 15
From brownells.com: 15
Average rating: 4.9

I'm glad I spent the money. (15/06/2013)

The fit, finish and function of this product are outstanding. No additional stoning or polishing was needed for a perfect trigger.

Great product (13/01/2015)

Very High Quality (10/02/2016)

works great (17/11/2013)

HD120TR EXTREME SERVICE SET TRUE RAD (09/02/2014)

Perfect Installed in S&W "E" 1911 drop in fit 3.5/4.0 trigger , Breaks like a glass rod .

True Radius (21/02/2015)

Almost too pretty to install (25/03/2017)

Amazing disconnector (13/07/2013)

makes a fair drop in (28/01/2018)

Excellent (17/04/2011)

Fantastc, a real improvement (02/09/2011)

Will buy another set (11/01/2012)

This set was a drop in fit for my RIA M1911A1. I intalled this kit with a new trigger and boy did it make a difference. Less slack and nice crisp break. Money well spent

perfect!! (17/02/2012)

Excellent compnets (19/02/2012)

Installed these in my GI Expert ESP and what a difference in trigger pull. Parts dropped right in without any modifications. Going to have to buy a set for my Para LTC.

Broken Back can shoot (19/05/2012)

Read 15 more ratings on brownells.com