USGI 81mm Mortar Fin

New Old Stock USGI 81mm mortar vietnam/WW2 vintage fins. As mentioned they are NOS but still have some surface rust from storage and a thread cut which you should be able to screw on, at worst rethread. Can fit multiples in medium and large postal flat rate boxes. Photó is representative of the lot. See pics and feel free to email me if you have any questions, Thanks