Henning Group is the OEM manufacturer of the Sig Sauer P320 X5 Legion magazine base plates. We offer our version which fits all the P320 X-Series grip modules. We also manufacture Magazine Extensions for Sig Sauer P320 whether it's for EDC, LE or Competition use:
Sig Sauer P320 EDC Plus 3 Magazine Extension (H600-P320)
Sig Sauer P320 Plus 6 Magazine Extension (H141-P320)
Sig Sauer P320 X-Series Magazine Base Plate (H444-X5)