Yes, the tippmann 98 and all of its variants use the same threaded barrels.
Yes. Tippmann is the company that makes the model 98 and all of its variants. The "Tippmann 98" may have "platnum" "custom" or "custom pro" after it, but it is an almost identical marker.
No, they will not both fit unless you have it custom fitted.
Yes it can.
Thread count is a textile term. however The pro carbine has A5 barrel threads.
Roughly 600
probably up to 600 fps
About an 1/8th of an inch.
standard .68 caliber.
No. The tippmann sl-74 I and sl-74II are threaded for sl-74. The tippmann pro-carbine is pro-carbine threaded. The Tippmann 98 is 2 different threads, they changed half way through production. An older barrel may not work on a newer gun because of tighter tolerances in the older stuff, but you can buy adapters if you happen to get into a jam like this. (Mostly you don't have to worry about this unless you get EXTREMELY unlucky) Tippmann a-5's are threaded for a tippmann a-5 adapter witch then screws into the gun. Tippmann x-7's are the same thread as a-5's. Hope this helps!
The wire is called a macro - line, and is on most semi - automatic guns. All it does is feed the air into the marker from the airbottle. Hope this helps!
no it's automatic
No. The UMP grip uses push pins to attach to the x7. The 98 simply does not have holes to accommodate them.