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Something that I've noticed that nobody else mentions about the impending Glock V.

First examples will ship in November.

Glock is a big company and big companies don't make big changes swiftly.

A complete change to the fire control to be compliant with the impending California legislation had to have started design before their bill got traction.

If we had God's video tape, I'd bet we'd see that Glock was deeply embarrassed and troubled by the "Glock Switch" and had come to the realization that a complete redesign was needed.

Changes of this magnitude take years.  Especially since many of the better ways to not-Glock a striker system are still under patent.  Those patent holders surely remember litigation from Glock, so licensing those designs is probably out of the question.

I think that the roll-out was hurried by California's legislation, though, otherwise we'd have seen the new Glocks in the hands of gunwriters by now.  Or someone would have leaked ahead of the press embargo on reviews...  Or something.

Glock clearly got their elbow jostled. 

Update:

Looks like they actually announced the discontinuations back in April.