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Discussion Starter · #1 ·
Ok I have been doing some reading and I'm really confused by the different pistons. I know they are more sturdy for use with higher springs but do they add any FPS to the setup? Also what is the difference between the red and orange pistons? I assume one is going to have higher tolerances than the other but I cant even find that info!

Heres the Orange piston:

and heres the Red:

I have seen Vacuum pistons for the APS series but none for the VSR series. What exactly do Vacuum pistons do? Are the Red and Orange pistons vacuum pistons?

Sorry for all the questions.

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