Night Optics Falcon 6x Gen 3 Gated Long-Range Night Vision Binocular - Manual (Page 143)

C-2
Column (4), Unit of Measure (U/M). Indicates how the item is
issued for the National Stock Number shown in column (1).
Column (5), Qty Recm. Indicates the quantity recommended.
Using Unit Responsibility. (Marine Corps Only) A list, in
alphabetical sequence, of items that will not be issued with the end
item. They must be requisitioned, as required, through the supply
system by the holding organization or the using unit.