I am in the middle of a State Firearms Instructor Update that I should have had last year.
Something I learned was that a Glock issuing agency nearby was bending the snot out of Glock trigger bars. Went to Glock about it and, of course, the engineers blamed the cops. For years we have set up a Type II or III malfunction, and had the students from the low ready bring the gun up and "experience the malfuntion" then go reduce the malfunction.
The problem was, near as I understand it, was that when you set it up that way the gun had the trigger forward, and the trigger bar was pressing against the connector without the striker tension resisting you, and the trigger spring helping you. The tiny refridgerator light went off in my pea brain, and remembered the admonotion to not pull the trigger with the slide off unless you were controlling the trigger bar by the upward protrusuion for the safety plunger as you did so. This was one of the standard armorer's tests.
Apparently the solution was to dry fire, dropping the striker, then locking the slide to the rear, then set up the malfunction. The difference being the trigger is not being held by the trigger safety against the trigger spring pressure, then suddenly, forcefully released into the connector.
Not sure if I cognatively understand the process as well as I want to, but a Type II or III malfunction has a dead trigger, not one that is forward that allows you to make that nasty feeling <crunch> as you "experience the malfunction" and snap the trigger/drop safety and trigger to the rear into the connector.
Since they changed the process for setting up malfuntions, zero problems.
Sorry if y'all knew this, it was news to me.
Another thing I had to relearn. During the opening qual course my dot disappeared. First time that had happened since on my Type 1 RMR06 since I got the updated sealing plate on my G-17.4 MOS. Still really not sure what happened there, but the leading theory was that I had manually adjusted the dot, so it would not adjust automatically for the morning light, and was just too dim to see under time constraints. So I transitioned and went to my irons. The whole reason I got into MRDS sights was my eyes did some funky stuff as I got older and when shooting with both eyes open my brain had two clear distinct front sights as my eyeglass prescription shifted. When I shoot irons I have to close one eye, or my brain randomly selects which clear front sight to use, resulting some wildly inconsistent shot placement, since there is still a dominant eye. This has been verified by my eye doc, who I think would just as soon take my money and not put in the brain power to try to help with these issues. I don't think I remembered to close one eye for the qual, and barely passed about 14 points lower than I have come to expect.
Then I got home and did some dry work, and noted that my sight picture was not lining up with my dot. The front sight, after about 2,000 rounds, had shot loose, despite degreasing and Lock-tite. It was wiggling like a six year old's loose tooth. So in one day, my optic was not up to the job, likely my fault, and my irons failed. Still passed, but it was a lot more work on my part than it should have been.
A couple of people here have complained about the Glock front sight and its method of securing. Add me to the list, as I eye my aftermarket slide with the dovetailed front sight...
pat