5KU Magazine Extension for SIG Air P320 (VFC) M17/ M18/ X-Series GBB Airsoft (Gold)

Key Feature CNC Aluminum Construction Airsoft Extended Magazine Base ( Anodized Finish) Able to Increase 4 Rounds BB Capacity For Your Magazine Considerable extra gas capacity Suitable For SIG Air P320 (VFC) M17/ M18/ X-Series Gas Blow Back GBB Airsoft Pistol