No. It is Glock's way of meeting requirements of a solicitation trial in which P320 also competed but didn't get selected.
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My G47 has been solid to date. Should it be replacing the Gen5 G17 MOS? Who knows...
https://rumble.com/v26xhjw-new-gen5-...os-review.html
Who did something similar? The only thing(s) coming to mind is the Colt Commander top on an Officer ACP frame that I think has come and gone a few times since introduction around 20 years ago. Not super expensive, but above the cost range of similar purpose pistols. I believe Wilson Combat and some other custom shops have done kinda production/kinda custom models of 4" to 4-1/4" uppers on compact frames at even higher prices.
Other than that, I recall some shops like Behlert/Leckie doing that to Hi Powers and a few other models, but really only recall production pistols going the shorter top end on a full size frame route.
I had a Dan Wesson CCO aluminum frame 9mm. It would have been the carry gun to rule em all if it would have been reliable..
Saw one today. Neat. I don't have a reason for one but I would probably get one if I was in the market for a 17.
I think they'll sell a lot of them to folks who just want the latest Glock in the lineup.