The enhanced reliability spring kit is meticulously engineered to deliver a consistent 4.5 lb. Trigger pull when paired with JP fire control components. Designed specifically for compatibility with JP trigger parts, this kit ensures optimal performance and precision. While it is tailored for JP systems, users should note that it may not produce significant improvements when used with standard AR-15 trigger components. Ideal for those seeking to enhance their firearm's reliability and trigger response, this spring kit is a must-have for precision shooting enthusiasts who demand the best from their equipment. High-tensile spring wire Contains one hammer and one trigger spring