The Axis doesn't have nearly the amount of aftermarket support as the 110 Series but it is coming along. You can use the small shank 110 barrels, however the large shank will not work. The factory bottom metal will not interchange with the Axis, but the good news is you can now get CDI Metal which supports 10 round mags for the Boyd's stock.
See here
http://www.savageshooters.com/showthread.php?45007-Axis-CDI-Bottom-Metal
In addition, the Axis uses the same short action bolt heads that the 110 Series do but the Long action ones are not interchangeable. I am sure I forgot something!! But that's a good start.
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