This Model MF43106 Glock 43 9mm 6 RD Magazine is a factory original. The OEM Glock 43 magazine features a round count indicator. Durable as the Glock 43 itself this great Glock 9mm 6 RD Magazine features a steel liner that gives increased strength and durability. The steel liner is encased by a tough polymer coating that resists corrosion, deformation, and wear.