I purchased a 52 a while back and love it. But the previous owner had removed the rear sight and installed a BOMAR rail. The added weight forces me to load 3.0 GR. Of BE behind a 148gr WC to cycle.
I bought one that had a full rail and an OLD red-dot installed. The type that looks like a full-length scope.
The front sight had been milled off, and a blanking plate installed in place of the rear site.
Here's the thread on how I "fixed" it.