It would be better to ask Remington that question.
It's rated around 280 FPS. This is average for this rifle.
Dont believe Browning chambered a rifle for the 6mm Remington cartridge. Do you mean 6.35mm (a pistol)?
6mm .12 gram or 6mm .20 gram BB's are recommended.
Usually a custom job these days.
Unknown.
It depends on the particular model of the rifle, not the caliber it is in. What model and make is it?
Probably 1.0-1.5 MOA, depending on WHICH Ruger rifle.
Depending on condition, $150-$200.
No- but Google does: http://www.retting.com/g/belgflobertrifle.jpg
Yes. I own the rifle myself, buy .36g BBs, or else the power of the rifle will send the BB flying in the wrong direction.
Do some internet searching. Try e-gunparts.com