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→IIg. The Spring Guide:
http://www.airsoftretreat.com/gallery/data/624/medium/11.jpg
Like the piston head, the spring guide also comes in a bearing variant, which performs the same function as the bearings on the piston head. Again, the bearings act as a small spacer, increasing FPS by about 5-10.
=== IIh. The Spring: ===
