SpudFiles

I am now to pneumatic guns and i am interested in making a airsoft gun with a close design, and i have questions! lol plz help. also plz dont get mad at me if i use your picture. *NOTE: NONE OF THESE ARE MY PICTURES!!!*

The picture is attached.

what is the green thing???? whats it for?? ive always wanted to know...
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that would be a sprinkler valve.
it is used to hold the air in the cahamber until you press a button or flip a switch or something and then it releases the air into the barrel, forcing the projectile out. you can even modify these valves for pneumatic actuation which creates a faster opening time, resulting in a much faster speed of the projectile.

Plz use proper grammar, thanks. And do some research before you ask here. The Spud Wiki has a lot of info.