Nope. I've got an SBE and the Montefeltro is different. After you take off the end cap, the barrel fits over a threaded stud on the end of the magazine.
Does anyone know how to disassemble the magazine tube on a 20ga Montefeltro? Mine got pretty wet today while hunting in the rain and I'd like to remove the magazine spring and clean, dry and lubricatel the spring and tube.