The TTI Ultimate Charging Handle is designed by Taran Butler to be the perfect size and feel, with its unique knurling and front serrations, to function during high-speed 3-Gun and Tactical operations. It is machined from billet stainless steel and coated with Ion Bond (95 Rockwell) in their Slate Gray finish. It is virtually indestructible.
Big Book Catalog, Issue:67, Page:196
Made form billet stainless steel with a Ion Bond coating.