"Issue boots"?  I loved to look down the aisle of my drop aircraft and check out the footwear of the baddest US Army troops you do not know about.  Zero "issue boots"!  ALL wore good-old- boy hunting boots.  Like, current troops get to choose their personal athletic footwear?  I doubt some of these personal combat boots were "MilSpec" but when it is life and death, "FTA".