Set Spring Shims Power Up Universal 10mm Airtech Studios

Airtech Studios is a Hong Kong-based company of airsoft enthusiasts specialising in the design of airsoft parts.

Here we find a set of 4 shims made from grey and green coloured polymer. They are compatible with the 10mm diameter spring guides and will provide a power gain ranging from 5 to 50 FPS depending on the combination. Ideal for adjusting and upgrading the power of your airsoft replica to exactly the power you want.

The shims are all a different size/thickness and starting from the smallest to the largest, they provide a gain of 5, 10, 15 and 20 FPS respectively and can be combined together as required.