New release Fromm glock. It’s a Glock 19 slide with a 17 length grip. Not sure why you wouldn’t just put Pearce extensions on your G19 mags and get the same thing?
http://www.recoilweb.com/news-of-glocks-19x-pistol-leaked-132572.html
http://www.recoilweb.com/news-of-glocks-19x-pistol-leaked-132572.html