I have had a slam fire -2 shot burst- with my AR, a dirty firing pin, and standard primer. The NATO or Magnum primers probably would have prevented it from occurring.
I'm planning on using those CCI #41 primers.
The thinness of most primers makes me a little uncomfortable on an AR. Y'all have seen those dimples from a chambering, I'm sure. The firing pin has a good bit of inertia, even if nothing is wrong.