Perhaps Israeli surplus?
I only ordered a few to test. I have a bunch of good mags already, but it never hurts to have some more. If these work out well I'll order a few more.
I also got an HK rifle cleaning kit, just to try it. It works like the Boresnakes, where you drop a weighted line down the barrel and pull a brush or swab through. And it comed in a little self-contained case, which looks handy.