RE: Can' t shoot carbons? (my old PSE bow)
That 31" carbon arrow from Wal-Mart already had the nock on it, and the screw in tip adapter. It was made by Wolverine and was just a cheesy, generic, $2.95 type of carbon arrow.
I did take a few shots with it, and it was okay, but shot about 3-4" too low (it sat too low in my TM Hunter rest).
Butch