Correct me if I'm wrong, but I thought that the only difference was that the X-7 stocks had a more elongated bottom adapter tab (the rectangular one as opposed to the circular top one) or that something was different with the bottom tab. So, wouldn't it just mean that you'd have to shave off/modify part of that tab? Of course, an air-through stock probably wouldn't work at all because it probably relies on that tab's shape.

At least that's what I thought because people used to wedge A-5 stocks in X-7s and I thought that all that was off was that there was a gap at the bottom because the tab was shorter...

I'm probably way off though...

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