Okay, yes I origionally intended to have the barrel a bit smaller but forgot to fix that. Someone actually already caught that mistake on another forum that I posted this on. I see what you are saying about the spring needing to be messy. Maybe a tiny equalization hole in the side wall of the pisto...

Ok, what do you guys think about this? http://www.geocities.com/sgort87/piston This piston works by a spring keeping the valve shut until there's enough pressure on it to open it. This makes it so the air doesn't enter the chamber until the piston is fully locked forward. This should work as long a...