Timney Triggers feature precision machining, workmanship and are individually tested and calibrated by hand. The AR15 Competition Trigger is ready to install in your AR and deliver an exceptionally smooth, crisp, creep-free single-stage trigger pull. All components are captive in the lightweight, aluminum alloy housing. Its hammer is wire-EDM machined from S7 tool steel, while the EDM is cut from A2 tool steel. This model is compatible with your AR15 firearm, has a small pin, and a standard curved trigger.