Own? I was shocked to find out that officers in my local army were forced to buy their entire Kit. It sounded very pyramid schemey. There must be a line between what May owns and what she is assigned by the Quartermaster. Considering the tech inside those suits of armour (Just simply only leather, my ass.) it's unlikely that any S.H.I.E.L.D. agent would be allowed to take that stuff home, or take it with them after retirement. If "retirement" is possible. Prisoner anyone?