In fact, on closer inspection which I've recently done, the CA loading inlet is designed opposite to the TM one. When the barrel is inserted, the hop-up unit fits very nicely flush against it, but it floats such that it will push downwards to accomodate the barrel.
Actually, now that I read both side by side, I think that they may be designed almost the same, but the CA will still disassemble fine with a mag in. I've noticed that the inlet needs virtually no play to allow the hop-unit to fit in place.
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