This is a factory Heckler & Koch 9mm 10 round steel magazine for the HK P2000 subcompact pistol.
The P2000 SK (subcompact) combines elements of the successful HK USP Compact pistol with recent technological innovations from HK engineers — only in a smaller, more concealable design.The P2000 is a short-recoil operated locked breech pistol with a modified Browning-type linkless cam action with a vertically tilting barrel also employed in the USP series of self-loading pistols, as well as most modern linkless semi autos.
Heckler & Koch is a German defense manufacturing company that manufactures handguns, military rifles, submachine guns, and grenade launchers. HK is also the maker of premier brand firearms for the sporting and commercial markets. Its reputation for quality, innovation, and safety make Heckler & Koch a recognized leader in the development of technologically advanced products.