Packaging and Figure Guide:

• Gnaw has never been reissued, any Gnaw being advertised as a reissue will likely be a counterfeit.
• The above image is a comparison of the v1 KO box. 
• #1 - The decepticon symbol is too close to the S
• #2 - Too much empty space when in package
• #3 - Darker grey border
• #4 - Sunburts and Gridlines issues
• The v2 KO Box fixes most of the above, however the sunburst issues remain around the right foot. In addition the perforation line is only present on the left of the tech specs.
• KO Gnaw boxes sometimes have the Japanese mail-away/limited edition sticker on them. Authentic mailaways come with both English and Japanese instructions.

The below photos were saved from AC Toys before the links were broken. Many thanks to the original creator.