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Steel AEG Upgrade Spring with Progressive Coils by Maple Leaf in black finish.
Spring strength M155.
Special progressive coil design reduces resistance and stress on the piston teeth within the gearbox.
Made from high-quality steel wire, polished and oil-tempered for extended durability.

For more than 25 years, we know what you like about airsoft.
The spring by Maple Leaf enhances the performance of your AEG airsoft gun. Thanks to its progressive non-linear design, it features varying coil densities, where tighter coils ensure reduced resistance and smoother compression.
This design minimizes wear on the piston teeth inside the gearbox, significantly improving durability and overall performance. The spring is made from durable steel wire, polished and oil-tempered to ensure high quality and reliability.
| Color | Black |
| Muzzle velocity (m/s) | 155 (m/s) |