Original U.S. Korean War Deactivated 81mm M43A1B1 HE Mortar Shell Round dated 1953 with Fuze - Inert U.S. Ammo and this is definitely the

and this is definitely the best by far

with the caliber listed as

Barrel with salt and pepper pitting overall from long time storage

This indicates it was manufactured by F

This example is stenciled:

Original U.S. Korean War Deactivated 81mm M43A1B1 HE Mortar Shell Round dated 1953 with Fuze - Inert U.S. Ammo and this is definitely theOriginal Item: Only One Available. Totally inert and demilitarized according to BATF guidelines with hollow body and no fuse. This mortar round cannot be converted to an explosive device. Unloaded or dummy grenades, artillery shell casings, and similar devices, which are cut or drilled in an BATF approved manner so that they cannot be used as ammunition components for destructive devices, are not considered NFA weapons. This example is in total