I have a buddy who comes from the bolt gun/ LR shooting side of things who almost can’t shoot an AK or AR with a light trigger from a rest without accidentally bump firing doubles. Not saying that’s what happened with those agents/guns but he didn’t even know what was happening until I explained it to him and talked him through not doing it.
im strong, i can run faster than train
Folks that inadvertently double/bump fire guns almost never realize that they are doing it.
KAC 2-stage triggers are designed and verified to provide a 5.0lb +/- 0.5lbs at break. That is intentional as an effort to reduce the potential to double, but it still happens.
I've had to deal with it in the past, and when it comes to customer interactions, they really don't like it when you blame them for doing it without checking the gun out.
That's why I recommend sending the gun to the guys that get paid to address those issues.
Director Of Sales
Knight's Armament Company