The Timney Triggers IMPACT is designed to provide a smooth and clean 3-pound break, seamlessly fitting all Mil-Spec ARs. This trigger system is accommodated within a lightweight aluminum alloy housing, ensuring all components remain secure.The hammer is Wire-EDM machined from S7 tool steel, promoting durability, wear-resistance, and superior IMPACT resilience. This ensures the device can handle heavy usage without succumbing to chips or breakage.Other components are EDM cut from A2 tool steel, before being heat treated to Rc 56-60. This process ensures extended service life. Installation is straightforward with your rifle\'s original hammer/trigger pins. Through the use of Timney\'s proprietary design, the risk of pin-walkout is eradicated.