My brother has two GI type ammo cans with the stencils indicating M13, which I think is 7.62 linked belts. However, these are not the standard size M19 30 cal can, they are about 1/2 in narrower and an inch or so shorter. They actually look like they were made for 5.56 size ammo or belts. Does anyone know the designation for this can and where if anywhere, can they be found. If I can't find out, I'll have to make a trip to Knob Creek for the shoot in the spring!