I'm not really sure what you realy said there Spartan, but that is just due to a simple need of maybe rewording on your part, or me not reading this when the only thing keeping me awake is what used to be in that MDX bottle of Carrtoon...
I have made many, many silencers for pressurized air Nerf blasters, air rifles, the like, and have found that my nice, more legal than most (except Carrtoon's, which seems to me to be very legal, albeit it probably not too terribly effective) and have decided that what you really need to think about for making somethign quiet is barrle volume, air velocity, dart velocity, dart-barrel fit, dart-barrel seal (almost the same as the one before it), muzzle shape/design/what-have-you, suppressor length, suppressor diameter, core hole sizing, core hole spacing, air pressure, air volume, and a few other variable I missed in there. There really is no easy way for me to tell you what would mathematically work well, as I have yet to give those variables numeric definitions to make equatiosn and the whatnot. Perhaps someone with more time/energy/money would like to do so...
Anyway, my SOBR has one of the most effective silencers I have made, and seen/heard personally, due to a multi-chamber, multi-baffel system and a whole lot of other paraphanalia I wish was ingenuity. There's some pics somewhere...try looking through the 50+ pics of my
Nerf sub-album on
PhotoBucket. I highly recommend them. I have uploaded over 350 pics and have yet to run into a problem. Sometimes it will take the same file as well, the same file, even if I ahve changed something on it, but, well, yeah...there's a guide on this (NerfHaven) site which has my technique for drilling holes. They may not be fancy like Carrtoon's, but, well, I only need that for higher-velocity pneumatics...