Yes.
Yes. The A5 stealth comes stock with a top rail therefore a BT or Tippmann sight can be screwed on.
The tippmann A5 is supposed to be used in paintball.
This statement is half true but half untrue. The tippmann A5 and 98 custom do indeed have different threads. But after the A5 tippmann made the X7 which has identical threads to that of an A5. Because of this a barrel with "Tippmann A5" threads, will fit on a tippmann x7, but will not fit on a tippmann 98 custom.
Not very much, unless if you use a metal buffer tube.
No. the thread pattern is NOT the same
There are no manufactured ones
There are no manufactured ones.
No, the screw set is off and there is holes for the cyclone feed.
Opsgear.com. look up A5 shrouds on the bottom left
Unfortunately no. It would require heavy modification and machining to fit.
I believe it is a5/x7 threaded.
No. The Tippmann handle is screwed on from the bottom, where the bt is held on s rail.