The JP Enterprises JPS4.0 Spring Kit is a dedicated trigger spring replacement set designed to refine the feel of AR-pattern rifles that use mil-spec style fire control groups. Built around JP’s proven Tactical Trigger Spring Kit, this set delivers a consistent 4.0–4.5 lb trigger pull when paired with compatible JP trigger components, giving shooters a cleaner, more predictable break.

This kit is ideal for shooters who want to enhance the trigger on their AR-15 or AR-10 without replacing the entire fire control system. It supports general range use, training, and recreational shooting where a smoother, lighter pull can improve control and confidence. The combination of carefully tuned springs reflects JP Enterprises’ reputation for thoughtful engineering and dependable performance in aftermarket AR parts.

Key Features:

• Manufacturer: J P Enterprises
• Model: JPS4.0 Tactical Trigger Spring Kit
• Trigger Pull Weight: 4.0–4.5 lb
• Compatibility: AR-15 and AR-10 platforms using mil-spec style triggers
• Included Components: Yellow trigger spring, grey hammer spring, disconnector spring