Find it here - https://doublemdefense.com/product/shield-arms-9-round-9mm-magazine-fits-g43x-includes-steel-mag-release/

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Factory New.
UPC: 850029544777
SKU: Z9-COMBO-1M-1C
Item Description:
Glock pistols and magazines are known for reliability – the Z9 maintains that same Glock reliability, while giving you a 50 percent increase in magazine capacity in the same overall footprint. Shield Arms accomplished this increased capacity with their patent-pending magazine geometry, allowing the rounds to stagger, thereby fitting more in the same amount of space.
Item Specifications:
UPC 850029544777 Manufacturer Shield Arms Manufacturer Part # Z9-COMBO-1M-1C Type Magazine Model Z9 Caliber 9MM Capacity 9 Rounds Color Black Accessories Magazine Release Fit Fits Glock 43 Subcategory Pistol Magazines