I've bought 6 bullpups in the past year. I have a problem.
I sure hope you recorded all that and put it on youtube!
Just got my Beeman .22 bullpup, it's as it was from the factory setting power wise. Planning on lightly tuning it this weekend, may bottle it eventually. I wanted it to be quieter, but didn't want a big ol moderator hanging off the front. My goal with this little guy was to keep it a compact 22 bullpup. With my kit installed it's 31 1/2" long.The factory air stripper that was in the gun did a poor job of diverting air to the shroud. Also the shroud was not very centered on the barrel with their four little internal standoffs. I extended the shroud and made a tapered shroud centering piece and then made a beautiful 80mm long air stripper/ Monocore section. That diverts air back to the shroud, and have a 45mm ish long extension section at a slightly larger diameter (26mm) for added sound deadening. With crosman 14.3gr at factory settings I was in the high 70 db range at 10' from the muzzle. I'm going to start selling these as a kit to install on your factory shroud. The air stripper/ extension piece weighs around 1 oz. And takes off a lot of noise!