Modify Quantum Piston Features Full steel teeth rack with Nitroflon coated surfaces. Lightweight polycarbonate construction. For high power / high-speed application. Perfect length ratio of the lubricant rails along the side gives an absolutely faultless performance inside the gearbox. Reduce noise and rapid wear to increase smoothness and durability. DESCRIPTION Modify Quantum Piston: Full steel teeth rack, Nitroflon coated, Strengthened Piston Modify Quantum Piston is a newly-designed full steel teeth rack, Nitroflon coated, strengthened piston, features improved rigidity, unequal-length track for perfect contact against gearbox. With superior stiffness, the lightweight polycarbonate construction, coupled with the unequal-length track, the piston not only reduces the load on the gearbox but also delivers superior performance. Modify Quantum Piston with full steel teeth rack, wear-resistant, Nitroflon coated steel alloy material, Modify Quantum Piston has a high strength to suit modifications for high-speed shooting, high torque applications.