'Madbull' M120 Non-Linear Spring (Green) (MB-ACC-M120SG).

Madbull have brought out a range of colour-coded springs that perform just as well as it looks. The colour is actually hard-coated onto the springs via a special process, and is not painted on. Madbull have been testing these springs thoroughly and have proven that the length and force remain consistent throughout.

Other features:

Consistent even for100000 shots!

Non-linear design (calculated)

Colour coating to reduce effects from environment

Designed & Manufactured by experienced engineers.

Premium quality German piano wire

For details of the product, please visit madbull official web site:

http://www.madbullairsoft.com