I stand corrected you’re absolutely right. I shoulda paid more attention and I’ve watched that video like 3 times lol. Think I got lost in the magazine swaps back to back to back. Looks like gen 5 baseplates do have clearance issues I appreciate you pointing that out before I spread more misinformation lolNot trying to argue (I love Gen 4 17s and 34s and have no need for this gun), but he's using different base plates. It does not look like Gen 5 9mm factory mags with factory base plates aren't going to go in because they have a lip on the front.
Edit- on a positive note, I’ve got glock baseplates scattered all through my house like most glock owners do but you’re right.