Handgun variety vs one platform
Hmmm ... "platform" ... the McDonnell Douglas Phantom II F-4 E/G series, which I adored maintaining the radar system of, was considered a 'platform', too.
As Inigo Montoya once said, "I do not think it means what you think it means."
You are becoming a Glock afficionado. Whatever caliber, as long as it is 'launched' from a Glock.
I wish you well, in your search. I will not touch a polymer anything, but that's me.