Echo1/Modify - Upgrade Spring M140 (430-450fps) for AEGsMOD-M140
- Modify's upgrade springs are manufactured from A class piano wire for strength and durability.
- Irregular pitch coiling for enhanced performance. Very Consistent FPS.
- Every spring has gone through vigorous and Sophisticated quality tests from the moment a new design leaves the software drawing through to final mass production.
- Easy to install.
- Modify S140 (430-450fps)
- Qty: 1pc
Note: ****It is highly recommended to upgrade plastic bushings and spring guide to metal bushings and spring guide with this product.***