Yes length shown is carbon tip to tip, and I believe they are standard aluminum inserts. They are the style where you can’t actually see the insert, it’s down in the arrow, as pictured.
Did some looking on the arrows, aluminum inserts that are epoxied. If you want to cut them, 28 3/8” carbon to carbon is the longest it looks they can be cut and still miss where the insert is, four inserts are out, they weren’t glued all that well, other five are still in there.