I bought an "FMA Fast Helmet Upgraded Liner Kit L/XL - Black" from Socom a couple of months ago, they sent me the tan instead, so even a standard order is enough of a Mystery Box for me thank you.
(I just needed it asap, so I ran with the tan anyhow, but sent them a courtesy e-mail to let them know so they can adjust their stock / warehouse system but they didn't bother to reply to me. I will not use them again.)