The SNS trigger is simple enough. Most parts are stamped out steel, then twisted and bent into shapes need.
IIRC the right hammer may be slightly different. The contour of the back side of it is slightly different than the plain 2 trigger gun hammer. The trigger is reset by a spring loaded arm riding on the back edge of the right hammer as it recocks each time.
Trigger plate is the same 2 slotted type. SNS trigger uses the left(rear) slot for the trigger. Right slot is filled.
Inside underneath the tang is the antidoubling counter weight.
A small slot milled to accept it and cross pinned. A simple coil spring supplies the power.
