In September 2012, Nighthawk Custom started using only parts that they developed in house. These parts are all fully machined from solid billet. Billet parts are widely known to be much stronger and more reliable than other manufacturing methods, and Nighthawk offers nothing but the highest quality parts to their customers.This hammer strut was designed in conjunction with renowned pistol smith Bob Marvel. Like all other Nighthawk Custom parts, this one is CNC machined from bar stock. It also has a unique radiused end to fit the mainspring cap more precisely.