That is a 110 style bolt in the photo.
I think what you're confused by is that there are two different firing pin assemblies used in the 110's. The style you have pictured above is the "economy" firing pin assembly which was originally designed for the Axis. It didn't take but a year or two for Savage to realize, "Hey, we can use the same setup in the cheaper 110 models to cut some cost..." and that's exactly what they did. The firing pin itself is specific to L/A or S/A 110 or Axis so they are not interchangeable (different overall lengths).
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