US Made Titanium Benelli M4 Magazine Tubes! Available online Jan 1, 2009. in Benelli Posted May 9, 2010 Our back-ordered Wolff Springs shipped Friday... expecting them in later this week. With springs finally back in-stock, all orders through today are scheduled to ship one week from tomorrow. The oldest order affected by the shortage was placed 12 days ago. Thanks to all who ordered. Will the full length TAN mag tubes also being going out then?