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what dovetail cutter for XDM/SIG sights?

2.4K views 2 replies 2 participants last post by  pbnationrc  
#1 ·
I see there are 60, 65 and less common 74 degree dovetail cutters. What one do I use? I want to put the night sights off my XDM on my P11.

Of course I will have to TIG weld the holes and slot first on the P11 slide. Thats another question then, are P11 slides heat treated if any one knows?