Specification information: 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 hamm mfg: harrison design & consulting 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. Reliable & durable handgun disconnectors by Harrison. Manufacturer MPN: HD123.
 Indicative Price: USD 29.99
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