Right TP. First look at this picture for half an hour and memorise it. Cos there’s anything more annoying than a magazine being called a clip. And yeah, I know, all the movies and books do it, but that just means it suspends disbelief and makes anyone that’s handled these things for real rant about it to themselves for an hour.

And here’s another. Just in case you’ve forgotten already.

But apart from that, you’re right. Removing a fully loaded pistols MAGAZINE doesn’t mean it’s safe. Although some manufacturers did add magazine safety’s to their weapons so that they couldn’t fire without a mag inserted. The Browning Hi Power being one. Anyway, people realised this was dumb, and it isn’t widely used anymore.
Back to the point. If the pistol had a round in the breech, then it was still live as removing the MAGAZINE has no affect on that, and it can still shoot as usual.
Now go back and look at those pictures, I won’t hear of such things again

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