Trigger Point Technology is a company in California that was started by a certain Terry Abst, a former airline pilot. They have a very interesting and innovating device that they claim will help prevent negligent discharges primarily among Law Enforcement and Military users, but it can also be applied to all manner of civilian firearms. The company has a website up that attempts to explain things in detail, but as admitted by Terry, it needs some serious revamping and changing because if you go on it, you won’t understand what they are trying to get across. Initially I thought they had a trigger mounted magazine release, but after a lengthly phone call with them, I was able to acquire the straight dope.
Essentially the systems is a laser activated device with two switches, a primary switch that is mounted where the trigger finger would rest outside of the trigger guard, and a secondary switch that is mounted directly on the trigger. The primary switch can be used momentarily, or can be constant on, but both cause a rail mounted laser on an AR or a handgun to emit a solid green laser. The role of this laser is for tactical use and for everything else anyone would want a laser on their firearm for. However the secondary switch is on the trigger, and is only activated with a gram of finger pressure, essentially just resting your finger on the trigger will set it off, and this emits from the same laser, a flashing green diode. The intention of this switch is to tell the shooter that their finger is on the trigger, for safety reasons this will let the shooter know that their finger isn’t supposed to be there, and for intentionally firing the gun it doesn’t matter that their finger is there. How this is achieved is through a device that wraps around the magazine well of the AR and has a second trigger/switch that extends alongside the actual trigger of the AR. Along with the primary switch on the actual magazine well, this is connected to a rail mounted box called the TRAM, that is then connected via wires to lights/lasers/PEQ devices on the rails. The box has a turn wheel that you can switch to whatever device you want turned on by activating the primary switch, while the secondary trigger safety switch will continue to only activate the flashing green laser. On the handgun, the company puts a magnet behind the trigger and on the frame of the handgun. This magnet is the size of a nail head, and this somehow activates a rail mounted laser, with a rail below it for existing weapons lights.
This is from the actual patent on the device by Mr. Abst, from the U.S. patent office–
A trigger activated switch for a firearm is disclosed. The switch comprises a Hall-effect sensor configured to be mounted in the housing or frame of the firearm, and a magnet disposed on a retractable member coupled to the trigger of the gun. The trigger comprises a firing module rotatably coupled to the housing to have a range of motion with respect to the housing from a non-firing position to a firing position. The retractable member is moveably coupled to the firing module and articulates between a non-engaged position and engaged position with respect to the firing module. The Hall-effect sensor is attached to the firearm housing in proximity to the magnet when the retractable member is in the non-engaged position. Motion of the retractable member from the non-engaged position to the engaged position causes the magnet to articulate away from the sensor, which then activates an auxiliary device upon sensing motion of the retractable member.