Yes, the tippmann 98 and all of its variants use the same threaded barrels.
Yes, the tippmann 98 and the tippmann custom are the same marker, therefore the threading of the barrel will be the same.
Yes it can.
No, they will not both fit unless you have it custom fitted.
Yes! They have the same threads. but the tippmann 98 custom platinum is not as good as the original if i were u i would ge rid of the thing...its not that it is bad it just chops and is not built as good as the tippmann 98 custom.
No. the thread pattern is NOT the same
probably up to 600 fps
standard .68 caliber.
No it does not. there is only one 98 shroud: Related links
They are actually one in the same. There was never an orginial "model 98" only the custom series. The difference though would be found in the Tippmann 98 custom Platinum series with its easy to remove body. There is also a difference in barrel sizes if im not mistaken but I think the newer 98 customs and platinums have the improved size (the same size as the A5)