This is for 1 case (Box of 100 magazines) Full Size. The Heckler & Koch HK USP 40 S&W 10 Round Magazine is an OEM magazine specifically designed for the. 40 S&W caliber Heckler & Koch USP handgun model 214854S. Made of polymer, this magazine has a capacity of 10 rounds and is manufactured in Germany. It is a reliable and essential accessory for those who own a Heckler & Koch USP 40 S&W handgun, ensuring they have extra ammunition readily available for their shooting activities.