S&W spanner bit

4570 ruger#1

New member
Just bought a S&W 629-1, it needs the rear sight replaced, i watched larry potterfields u-tube video on the how to install, in the video he used a small spanner bit, does anyone know where i could find that spanner bit?
 
Get a small screwdriver, narrow it to fit inside the sight screw cutout, and cut a notch out of the blade to fit across the screw.
 
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