plastonite cylinder

Whats up guys...

Hey well I am looking at the new TM L96 and am planning on getting a new piston for it. But you have to get the entire cylinder. Now looking on x-fire they do have a few different cylinders.

So this is my question... what is the benefits of having a plastonite cylinder as to just a normal cylinder?

I am planning on keeping the fps of this rifle around 350 - 400 fps. In order to keep it really quiet and as consistent as possible.

Thanks in advance for the help guys.