Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

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. HD-120TR set has a True Radius sear with the primary surface precision-ground and polished to an engineered radius located from the center of the sear pin. It comes with a correctly shaped and sized escape angle.


1911, Issue:11, Page:018
Big Book Catalog, Issue:67, Page:112
Mini-Catalogs, Issue:05, Page:003
New Product Supplement, Issue:621, Page:008
Sinclair, Issue:1A, Page:017

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.

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

HARRISON EXTREME SERVICE IGNITION SET
100-004-374WB
HD-120 Ignition Set
100004374HD-120 Ignition Set

Mfr Part: HD120

$129.99

In Stock
1911 EXTREME SER. SLOTTED COMM. HAMMER
100-004-781WB
Extreme Service Hammer
100004781Extreme Service Hammer

Mfr Part: HD121

$84.99

In Stock

Finish: Unfinished

View Dream Gun

1911 EXTREME SERV. TOOL STEEL SEAR/PRE
100-004-782WB
Extreme Service Sear
100004782Extreme Service Sear

Mfr Part: HD122

$31.99

In Stock
1911 EXT. SERV. TOOL STEEL DISCONNECTR
100-004-783WB
Extreme Service Disconnector
100004783Extreme Service Disconnector

Mfr Part: HD123

$23.99

In Stock
HD120TR EXTREME SERVICE SET TRUE RAD
100-011-123WB
HD-120TR Ignition Set
100011123HD-120TR Ignition Set

Mfr Part: HD120TR

$139.99

In Stock
HD120B EXTREME SERVICE SET BLACK DLC
100-011-124WB
HD-120B Ignition Set
100011124HD-120B Ignition Set

Mfr Part: HD120B

$134.99

Out of Stock
1911 AUTO HD-120 EXTREME SERVICE IGNITION COMPONENTS