This happened to me twice, but the second time was likely a continuation of the first. On a public server, I was completely geared up with an m4 and an fnx. I had painted the m4 attachments green. I signed off for the day, and when I logged back in the next day I was stripped of all gear and my m4 was stripped of all attachments. The fnx still had its attachments except no mag. I relogged multiple times hoping it would fix itself, to no avail.