The CCM Deluxe Pump Kit Handle Return Spring is a replacement spring for the pump handle, which helps it return to its forward position and close the bolt. The deluxe version uses a slightly longer and springier spring to ensure the pump handle closes completely, which is especially useful if the original spring was too short. • Function: The spring provides the force to automatically push the pump handle forward to its resting state after each pump stroke. • Benefit: Ensures the bolt is fully closed, which is a crucial part of the cycling process for a paintball marker. • Deluxe Advantage: The deluxe spring is designed to completely close the pump handle, whereas the original spring may have been too short or lacked the necessary tension. • Application: It is an internal component that fits inside the pump handle. Compatibility:• CCM Deluxe Pump Kit• CCM Econo Pump Kit• Check It Tactical Deluxe Pump Kit• Check It Mini-Cocker Deluxe Pump Kit• Vendetta Deluxe Pump Kit Specifications: Length: 3" Width OD: .30"