This is a U.S. made CMAG for an HK MP5, SP5 or clones. Near as I can tell, looks like it's never been used. It came with my SP5. Didn't know anything about them until I got this one. I did find out that these are hard to find and not cheap! They do make the clear ones and the .22 version. All I'm sure of though is, I'm not going to be using it. Sorry, but shipping or holds. Cash only as I have no cash apps. The only trades I might take is genuine HK mags, or German parts plus cash. Thanks for looking.