Hammer hooks are pre-prepped and sear nose polished for precise contact and crisp, clean letoff.
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. Harrison Design & Consulting 1911 Auto Hd-120 Extreme Service Ignition Components - Extreme Service SearĬritical ignition parts are machined from high-grade tool steel for precise fit and reliable, consistent function under the most demanding operating conditions.
