If I buy the action from MRC, what about trigger and bottom metal?
Included? or better options? The trigger is what I'm curious about, Is the MRC trigger identical to the Winny trigger?
They're included; trigger is identical to the "old" Model 70 with two jam nuts and bottom metal is identical to the Model 70s; "better options" is subjective with regard to bottom metal. And FYI, the triggers are often stainless -- even on the CM actions.