I bought this ammo a few years ago and haven't had a chance to shoot any of it so I might as well sell it. I'm not really sure what it is, but it is in 10 round packs and it says 10 Stuck (with two dots about the u) and M 43 Ub (with two dots above the U) on the back of the packages. The rounds are stamped 05 and 79 on bottom. SOLD!!