Wondering if anyone can help. Found local dealer with 1,080 round GI can of 30Carbine, appears to be 1986 manufacture, but the type appears to be marked "Ball KM1". What is KM1? Wondering if made in Korea, since many characters on outside of can appear to be Korean. Is this "US made" for Korea, or is it Korean manufacture? Interested in buying, but don't want to buy non-GI junk.