@Community Member posted:
The 43x and 48 are offered with a light rail in Europe, but the placement of the serial number makes it impossible in the US versions unless they move that plate. In Europe, mostly, they serialize the barrel and slide, not the frame. I've seen Glocks in Austria at least with no serial numbers on the frame. That's the norm.
The serial number is in the same place on the railed G48 and 43X.
Most European pistols have numbers on frame slide and barrel , and Glocks out of Europe have has serial numbers on the frame for decades.