Magazine usp cmp/p2000 9mm 13 round - great quality - Heckler & Koch P2000/USP9 Compact 9mm Luger, 13 Round Pistol Magazine w/ Extended Floorplate

These are great replacement original equipment, factory magazines. They are very high quality and work flawlessly in the USP. Disassembly is simple and it is very easy to swap the base plate if you prefer the flush style base. The price is not great, but Optics Planet has much better pricing than most retailers. Overall, I would recommend these magazines.