Another trimmed down version of packaging? Did you open it in wax, or open it in a shoebox you bought from someone? There was a year or two where Action Packed cards came in oversized packs that had one of these covers. Here's a link to a guy who opened a pack of these:
http://apackaday.blogspot.com/2009/01/1994-action-packed-monday-night.html
These were blank backed. The reverse he photographed isn't actually the same "card" as the Emmitt front he shows. The cards came in a plastic container between these two "covers". I can't say 100% that's what you have, but those are the only blank-backed Action Packed "cards" I ever remember seeing.
I'm going to reevaluate how I collect after the new year. It's just getting way too expensive for the new stuff. Sometimes I just want to buy a pack, not a whole box or even blaster.