Although anything over 14 inches makes your marker less efficient, yes, it will fit.
It shoots semi automatic and has a removable feedneck and barrel.
Any apex barrel with a 98 thread will fit the alpha black.
Yes, the 98 threaded Flatline Barrel will fit the Alpha black.
.68
The tactical edition has a 4 point butt stock and an 11 inch barrel and, M4- style barrel shroud. Otherwise it has no stock and a stock 8 inch Tippmann barrel.
The tippmann 98 stock.
.685 of an inch.
Price or usage?
Yes, the standard barrel has A5/x7 threads, but you can order it with 98/Alpha black threads.
Make sure your handle is screwed on correctly and tightly.
Yes. It is cheap, reliable, and is low maintenance.
All paintball guns are regulated at around 290 fps, the model is irrelevant.