This is the double trigger benchmark frame. There were 2 versions. One was the one you see above. The second had a built in beaver tail (2 stainless rods leading to head sticking straight out of the back of the frame. These frames came with out the internals (trigger plate/sear/springs/pins).
-TRIGGER PLATE = standard 98+
-SEAR = Standard
-TRIGGER SHOE = Although you could use a standard trigger shoe, that would defeat the purpose of this frame. A Double finger finger trigger shoe is what this frame was designed for.
-TRIGGER STOPS= None, although many did mod the frames to make their own..
-OTHER ADJUSTMENTS= I assume there are 2 set screws, one under the front and one under the rear of the trigger plate to remove any up and down movement of the trigger plate.
-GRIPS = Benchmark wrap around grips. They say benchmark in the circle on the center of the frame