MADBULL - Upgrade Spring M140 (450-470fps) for AEGs

Features:

• Ligth Orange Color - Hard Coated M140 (ugrade your AEGs fps to 450-470fps)
• Consistent > 100K shot
• Non-liner Design (Calculated)
• Color coating to reduce effects from environment
• Design & Made by experienced engineers.
• Premium quality German piano wire
• Qty: 1pc

Note: ****It is highly recommended to upgrade plastic bushings and spring guide to metal bushings and spring guide with this product.***Also, it would be wise to upgrade plastic pistons to polycarbonate piston; plastic piston heads to duracon piston heads; and standard gears to reinforced steel gears. Finally, just to be safe, upgrade the standard gearbox shell to a reinforced gearbox shell. Finally for best results a battery upgrade is also recommended.