SKS/AK 10-rd Stripper Clips, Unissued!
Genuine US GI! Unissued! These came out of the gov GI ammo demil program of a few years back, just two 40mm cans of 'em, so quantity is limited.
I suspect these are related to the 20-rd boxes of 7.62 X 39 labled "AK Ammo" which was manufactured back in 1970 or so by Uncle Sam. Strange stuff, but good quality stuff!