Springer Precision ESP/Duty Magwell - P320 AXGThis sleek magwell is the perfect answer for an ESP legal and Carry Duty minded magwell for your Sig Sauer P320 AXG grip model. 17rd mags do require the factory Legion basepad, 21 round magazines or Springer Precision P320 basepads mag extensions. Change your mags with confidence whether it's in the field or on the course of fire! Due to design variations, Springer Precision cannot guarantee compatibility with any other manufacturers aftermarket