The orientation of the coil spring within the trigger mechanism of an AR-15 platform rifle determines the force applied to the hammer, ultimately impacting the reliability of ignition. Proper seating ensures consistent energy transfer to the firing pin. A typical setup involves the spring legs positioned against the lower receiver and the trigger pin, with the central coils around the hammer strut. Variations exist, and consulting manufacturer diagrams is crucial for a specific model.
Correct placement is essential for safe and dependable firearm function. An incorrectly installed component can lead to light primer strikes, misfires, or even slam-fires. Understanding the mechanics of this small but vital element ensures reliable operation and mitigates potential safety hazards. Historically, issues arising from incorrect spring placement have highlighted the need for clear instructions and careful assembly within the firearm community.