MADBULL - Upgrade Spring M140 (450-470fps) for AEGsMB-SP140
- 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.