Tippmann paintball question, 10 points!!?

Okay. I have a tippmann a5, I have a m4 shroud and am looking to get the bigshot 14 inch barrel. Also Im getting a m4 front sight. But I need to know how wide the bigshot barrel is, 1 inch or 7/8th. I need to know so I know which size front sight to get? Thanks!!