Does anyone know what year they switched to the modern yoke? M4s have the (I wanna say round yoke) and I've seen a few M5s with the old style yoke.

Howdy,

My 1975 M5-210C had the lazy “D” yokes, since upgraded.
I also have a 1977 M5-235C has them as well, which I’m striping down and parting out. That’s a start for you.

Good luck in your quest for a date.

Tom