RE: scope mount for ruger MK1 pistol
Weigand Combat makes a couple mounts for the MK1. One is for guns already drilled and tapped and the other requires you to remove the rear sight to install. Neither require you to go to a gunsmith to mount one.
You can get them from Weigand themselves, Brownells, and Midway USA. In Brownells and Midway it says MK2 but they will also fit the MK1.
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