Franchi Affinity mag tube extender (+2)

[bronco1500]

Im looking for a +2 mag extender for my new franchi affinity. Some thing reliable, its gonna be a home defense gun. I was thinking maybe something for benelli since they are kinda sister companies.

Any thoughts or ideas ?

[CamW]

Is the Franchi Affinity the same as the 912 and 612? Choate makes a tube for those models.

http://www.riflestock.com/store/do/product/MXT/15-04-02