These Sten mags were purchased as a lot from a 07/SOT who used them for his firing range rentals. They come from the same lot as my cleaned up Sten magazines, but they didn’t feed reliably in a 3D Printed Mac-11 lower. This isn’t to say they won’t work with Sten mags, but I just can’t guarantee they will so I’m selling them uncleaned and as poor/fair condition magazines. I suspect that they’ll clean up just as nicely as my good condition magazines with a bit of flitz and some elbow grease, and there’s a not insignificant chance they work just fine with the gun they’re actually designed for.
That being said, they’re being sold as is, and the steep discount reflects that pretty well.