Gun Review: Electronic Arms 10/22 Bullpup with Electric Trigger
http://www.thefirearmblog.com/blog/2014/12/19/electronic-arms-1022-bullpup-electric-trigger/Electric triggers have been around for a while. Paintball guns have had the option for years, and there have even been dabblers that have installed them on firearms. One of the early discussions I found was over at Popular Mechanics (around ten years ago). I’m sure there are earlier references, but PM is pretty mainstream.
The guys at Electronic arms prototyped a proof-of-concept with a drop-in replacement assembly. That assembly was one of the predecessors to the version that I was sent to test and evaluate (and on which we actually did a review back in June).
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The weapon is divided into a “clean” side and a “dirty” side. Basically all of the electronics, aside from the solenoid, were situated in the forward “clean” area. This was done as a safety consideration. The rationale was that if the solenoid shorts out, the short would prevent firing as a closed loop in a solenoid results in a non-energized solenoid. If the trigger switch were to develop a short, a closed loop would cause it to continuously fire. Since the dirty side is the most likely to receive a short (and the probability of even than that is extremely low), the decision was made to place the solenoid in that area.
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The Bullpup has a mechanical safety button on the butt stock in a recessed area. The trigger circuit also has a power switch located on the left side of the gun on the forward hand guard. There is a red LED in a recessed area that indicates if the trigger has power. This LED can only be seen from the rear of the weapon.
They constructed it using a 16.1 inch Beyer barrel. There was some discussion about lightening up the platform, and this is one place it could be done.
Don't get me wrong, I like a good quality trigger and got great results on my baby, but that doesn't mean I don't like to experiment 
