It fits the 10/11/12/14/16 top release actions as long as it is for a top release and the action screw spacing is correct. According to a knowledgeable member it will not fit the Lightweight Hunter actions however. I can't tell you why.
I don't know the FV's magazine configuration and if it transferable/ direct fit to other savage factory inlets, but if it is there are other Choate options
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