Release triggers on shotguns have been used for decades.
Considering the application involved, if you need to shoot to defend yourself, the only "trick" to using them is to stop firing with the trigger in the forward position.
Now, how hard is that?
What we have are some who think change is dangerous and who can't accept that there may be an application for something like this. First, let's go to having full auto at all - its LEGAL. What we are really looking at is the NFA interfering with our 2A right to set the standard in owning our own militia rifles. But since that scares some people who can't accept others acting responsibly - and the vast majority of FULL AUTO owners do so, even more than the average automobile driver - what we get is some who would trade off YOUR freedom for THEIR security.
Second, if the application for rapid firing didn't exist, there would be no full auto. But it does, as some of the more recent public outbursts of violence have shown. Not only during race riots but also those stupid macho contests between bikers and "cagers" where in one event they dragged the driver from his car and beat him.
BTW, I have an AR pistol and I don't think I need to transport it in my daily driver - yet. But who am I to tell you that you shouldn't? Seems like I would be sticking my nose in your business.
Point being, the triggers and application are legal. Now, why would you bother?
First, I have noticed that the anti binary comments involve Giesselle triggers as a standard of what is right and proper for use. I find it ironic as they also offer full auto variants for those with the money. Second, it's about social posturing. "I have one and you don't." "Mine is better than yours." Yes, they are nice and a great option for precision shooting in competition. However, professional grade triggers for COMBAT use are the what we get by the millions in M16's. Nobody has discovered some intense need for a trigger in the hands of soldier defending his life or demonstrated that it will make the enemy "moar dead." What they can and do is leave their issue full auto trigger they use in their miispec 2MOA gun on semi - most of the time. But they do have the option for full auto.
Legally we don't at this time due to the extreme high costs of legal full auto guns. But we do have ingenuity - the same kind that invented holes in blades and assisted opening, the same thinking that got around the racially biased switchblade laws that were passed to disarm inner city gangs. All that was simply an anti-arms campaign by the left to demonstrate proof of concept that it could be done with guns, and here we are listening to the same thinking about binary triggers.
Point being, do you ever need to use one inside your home in defense of your life and family? Maybe not - but the same argument is made about having guns AT ALL. Again, who says you can't? It's legal, and like a laser, or even the A/C on your car, you figure out when to use it when it will be the most help.
Taking into consideration that the situation is one where your home defense has completely failed to keep the intruders away from your property and outside your home - own it, we are talking serious levels of denial and poor decision making - you are now confronted with a multitude of people who are threatening your peace and safety. They are surging thru your front door when you appear at the hallway with your binary equipped - what? Shotgun? There are more of those sold every year than binary triggers in AR's. Are you going to use the feature or not?
Well, make a decision, it takes less than three seconds to run 21 feet and attack you.
I would worry about it after the thugs are laying all over the floor and furniture. We each use what we think best. If you decide to put broken glass and razor wire on your compound wall, would I tell you "oh no don't, the neighbor kids might get cut up climbing over it for their ball?" Well, look at the neighborhoods where it IS done and tell me what the kids are told not to do.
Unfortunately we have a society where they weren't disciplined and now we are discussing whether binary triggers are a good option for home defense. I will tell you they are an option - but the money should first be spent on armoring the exterior of your property to prevent leaving you with the last ditch choice of flipping the safety all the way over to "full auto." Priorities come to mind. $500 for some driveway alarms and security window film would be a better up front expense. Not opening the door when someone rings the bell would be even cheaper - most intrusions start with a "condition white" sense that nothing bad is going to happen.
If your home defense plan is executed and in practice, and you are down to choosing what trigger in your personal weapon you will use for your last stand, then I would recommend a binary trigger. Better high rate firepower than half rate - to give it a different perspective. It is "official issue" and there are times and places it can benefit you. Just consider that it's an expensive embellishment on the firearm for a very small probability of use for your personal defense.
