Some of my weapon stats have reset to Zero

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The MG4, SG553, ACE 52 CQB, A-91, AKU-12, JS2, UMP-9, PDW-R, PP-2000, CBJ-MS, XM25 Smoke and M15 AT Mine are all showing zero stats yet I have used every one of them, some I had 100's of kills with. Can you restore my stats for those weapons from a backup, I'm not sure exactly when they got reset but I can remember using the SG553 around a month ago. Or do you think this is just a temporary glitch that will fix itself?