Feel slightly retarded asking this. But I finally got my FNX-45 to the range, and noticed that if I insert the mag with some force, or even bump the bottom of the mag with my palm after gently inserting it, that the slide will release on its own.
Ran about 4-5 mags through it like that, not even really thinking about it. I just thought "ooo, I like that"
Upon thinking about it some more today, I checked my manual to see if there was any mention of this 'feature', but no. Also did a little Googling before posting here, to see how common it was, and found lots of other brands doing the same thing.
Nowhere did I find that its actually something mentioned by companies, that the pistol was designed to do.
Anyone know if I should be worried about tearing something up by doing so? I havent yet stripped down the pistol to see if any of the smaller parts are being hit.
On a side note though, the edge of the mag release protrudes into the magazine tunnel, which allows the front of the mag to catch on it, if its not put in a certain way. Think I may have to pull the release out, and bevel the edge.