MAGEX2 EXTENSION KIT 9MM BLK KVA-MX2K90BL00 Manufacturer Model Number: KVA-MX2K90BL00 Manufacturer: Kriss USA Model: MagEx2 Extension Type: Accessory-Magazines Item Type: Accessory Finish: Black Shipping Weight: 0.3 Feature: Fits G17 Magazines Feature: +23 rd. Extension Feature: 40 rd. Total Capacity Optic Adjustable Objective: false Optic Reticle Illuminated: false