Originally Posted by 22WRF
The 5 digit ones should have the little screw on the safety.


You're right they do, as do G-6 digits made up to around 1998 or 1999 when it was finally engineered-out of the breech bolt sleeve unit.

“Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away” Antoine de Saint-Exupery