I'm pretty sure the regular FWT short action won't work in one of those old Compact stocks, even with a shorter mag box, because the regular FWT trigger sticks down so far that it'll hit the bottom of the trigger guard in the old, very shallow, Compact stock. The trigger on those rifles was actually shaped differently in order to not impinge on the bottom of the trigger guard. I still wish the company would make them again with that shallow stock. It couldn't cost that much extra to put a differently shaped trigger and a shallower mag box in it. Plus a totally different stock of course. Would be worth the extra cost to me.