I got the rest of my shipment from JoeKen today (12 AK-74 mags), and as I was inspecting them, I noticed some odd markings.
10 of them have the standard "10" in two circles, as all my other 74 mags have.
Two of them have a "21" in two circles.
I'm not thinking that they're particularly rare, as K-Var is selling them (according to pics of mags) pretty inexpensively.
Just curious what the 21 is.
IIRC, It's just a diffrent factory code. Made at a diffrent place.