Problem: while using both IR and visible spectrum lasers with a surefire SR-D-It switch, the plug in port on the back of the DBAL was fucked, I would get intermitent use of the laser, I did swap the switch with other Lasers at the class to make sure it was not the surefire switch. I mount my laser at the 12 o clock position on my DD rail and accessing the rubber button on top of th laser is almost out of the question.
Solution: We were able to use a hair band to pull the plug into contact with the contacts inside the laser, as a work around but I sure wouldnt want that issue arrising during a Home defense or LE or military scenario, let alone while hog hunting.
Another thing to keep in mind when the batteries get low, those Lasers start to act real funky, stobe effect and all sorts of ND's while you arent using it.
Another Laser straight up shit the bed half way through class.