The enhanced reliability spring kit is meticulously engineered to deliver a consistent 3.5-4.0 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 for your firearm. Please note that while it excels with JP components, it may not produce significant improvements when used with standard AR-15 trigger assemblies. Elevate your shooting experience with this specialized spring kit, crafted for those who demand reliability and precision in every shot. The kit comprises a red-coded hammer spring, a yellow-coded trigger return spring and a disconnector spring Spring steel is a type of steel known for its high yield strength, which allows it to return to its original shape after significant bending or twisting This property makes it ideal for manufacturing springs, as well as other applications requiring resilience and flexibility Spring steel is commonly used in the production of automotive parts, industrial machinery and various tools Its composition typically includes a high-carbon content, which contributes to its strength and durability