I recently purchased some extra mags for my full-size USP40. For the people who have been following my "USP malfunctions" thread then this may be familiar to you! Anyways, I received the mags today. How can I tell if they are legit? I received it in a small labeled resealable bag. The magazine is pretty much identical to my other USP mags in build, however it does not have HK stamped on the bottom of the mag plate. In fact, it doesn't say anything on the bottom; just blank. Also, on the side it reads "Heckler and Koch" and "Made in Germany" as well as "40 S&W" .. My other mags have the law enforcement marking on them as well as "Sterling, VA" and some other text too.
Anyone have similar mags? Are these legit HK perhaps new production? Third party rip offs? I can post pics when I get home.
EDIT: They are black 13-rounders.