.685 of an inch.
Any apex barrel with a 98 thread will fit the alpha black.
Yes, the 98 threaded Flatline Barrel will fit the Alpha black.
Yes, the standard barrel has A5/x7 threads, but you can order it with 98/Alpha black threads.
It shoots semi automatic and has a removable feedneck and barrel.
If you buy it with 98 threads, then yes.
Yes, they both use 98 threads.
The diameter
Barrel diameter
The diameter of a .308 Winchester barrel, specifically the groove diameter, is typically around 0.308 inches (7.62 mm). The land diameter, which is the diameter of the barrel's lands, is usually about 0.300 inches (7.62 mm). These measurements can vary slightly based on the manufacturer and specific barrel design.
The Project Salvo has Tippman 98 Custom barrel Threads.. Same with the Alpha black
the barrel, hopper, stock, and many others.
You have a Smith and Wesson model 14 38 special. The 38 refers to the diameter of the barrel. That barrel is 38/100 of an inch in diameter. A 45 automatic has a barrel that is 45/100 of an inch in diameter. A 9mm has a barrel with a 9mm diameter. You can shoot 9mm ammunition from a 38 special. A 22 pistol has a small diameter barrel.