I believe this showed as a non regulated rifle. Is there an AA comparable that is regulated.
Not quite yet, but a regulated version is coming in the Ultimate Sporter XS. That will likely be out closer to the summer.
Is it 190 bar?
Fills to 200 BAR/2900 PSI
Is the barrel threaded?
The end of the shroud is threaded
I've heard this isn't an ideal "quiet" gun for hunting unless you have the Q Tec silencer, is that so?
That depends on what you consider loud. The 510 platform is not too loud, but certainly not the most quiet either. The Qtec is not available as a stand alone part in the US, so I can't really say how much quieter it would make this particular gun.
What would the FPS be at low power and with what weight pellet?
around 500 f/s.
The max velocity is listed at 920 for both the rifle and carbine. How can this be true?
The carbine should have had a max velocity of 900 fps in .22 caliber. It's been fixed.