Brownells Hammer/Trigger Pin Set Features The Brownells Colt AR-15 .154 inch Small Hammer/Trigger Pin Set is built to work in conjunction with the Brownells Hammer/Sear Block which holds the hammer and sear outside of the firearm during fitting work. This setup gives a gunsmith a clear unobstructed view of the exact point where the hammer and sear engage something that is nearly impossible to see clearly inside an assembled lower receiver. An Allen screw locks the pin in place once positioned ensuring the hammer and sear sit exactly as they would relative to their actual location in the firearm. This precision positioning is critical when cutting or adjusting engagement surfaces since even small errors can affect trigger pull and reliability. Each pin in the set is individually numbered making it easy to keep track of which pin corresponds to which component during a fitting session. This organization matters when working through multiple parts or comparing factory versus aftermarket components side by side. The set is sized specifically for Colt AR-15 pattern trigger groups giving it accurate fitment for this common platform. Gunsmiths who regularly perform trigger work on AR-15 rifles will find this pin set a valuable addition to their bench. Brownells Colt AR-15 .154 Small Hammer/Trigger Pin Set Specifications Brand: Brownells Model: .154 Hammer/Trigger Pin Set Compatible Hosts: AR-15 Available At: GrabAGun