What is a registered magnum?
I did a little search and it basically says that its the first 4 years of model 29 .357's. I see these things often for sale. 7 of them on gunbroker as I type. Are they special because they are less common or are they of particular high quality?
How does someone identify a registered mag?
Concentrated power is not rendered harmless by the good intentions of those who create it.