The Blackhawk has the internal lock (the infernal lock!) but Ruger covers access to it with the plastic stock/grip. They show you right where you can drill a hole in your plastic stock to access it if you want! I'm sure that a hole has been drilled NEVER by ANYONE.Thank God thought Ruger had adopted the Hillary hole.
Say it aint so Ruger Redhawk
It's my understanding that the Blackhawk lock was only 'available' for a few years, and is long defunct...