525.00 Benelli supernova 3.5" Chamber Fredericton Jun 11, 2024 - 6:13 PM Ben T O'Donnell Hi. I have for sale a benelli supernova 12 ga. This shotgun has a 3.5 inch chamber and functions perfect. This model comes with a brass bead so I put a magnetic hi viz sight. Comes with one modified choke and a plug.