I was thinking some more. Although Amal likes the idea of an “actuate to fire” as opposed to “actuate to unsafe” (if that makes any sense) I can’t figure out how it could be done without a complete redesign of the FCG. There just isn’t any room in front of the sear as it’s all magwell.
My current idea du jour is to, instead of having only the single flat machined on the safety, machine a small 90* notch on the back bottom of the safety barrel and have the locking pin withdraw horizontally. The locking pin would both block the tail of the trigger from moving up, preventing firing, and it would also prevent the safety from being rotated. Doubly preventing firing. Then when the solenoid retracts the pin moving the safety to fire would rotate the remaining bit of the safety barrel into position to block the pin from coming back forward and jamming up the trigger in the midst of a firefight if the RFID read were to fail somehow. Which is my biggest gripe with the whole smartgun concept. What happens when the damn thing fails to read, locking my gun up with 3 bad guys running at me.