[ShelledPants]

I bought a Silencer off of Amos, and he did something pretty cool. AEG spring was down the center to prevent the spongy foam from interrupting the BB's flight. The drilled PVC is a waste of time, there is little to no back pressure on the BB, and most of the noise is the sound of the piston hitting the cylinder head. You could do what that link says, only glue the foam baffles together and then place an AEG spring down the center for the most sound absorbency. Ultimately? Waste of time.