Bolt Action Nomenclature

[Tatume]

Major parts of the action.

[mdi]

Do you wanna know or are you testing us?;-)

[frankenfab]

I voted ring and bridge, as most were, but there were double bridge actions as well.

[Texas by God]

If you call the rear receiver ring a charger bridge it changes my answer, which is two rings. And there were double square bridge actions for scope mounting.
My take only.