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.Nighthawk Custom's complete pin set is exactly that, complete. Even the mainspring cap and pin are included. This is the pin set you need for your next build, or re-build.