I acquired a couple of ex army peli cases recently, that were previously used to carry a "Rifle warner unit" (made by Thales about 2009). So now Im curious, wtf is a rifle warner unit??
Could it be the Green Laser Optical Warner?
Puts a laser dot on the target's chest so they are warned that the rifle is being pointed at them.
The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair.
Stepwise escalation in response to a threat might include chambering a round. That’s pretty unequivocal. However, it assumes that you aren’t already “made ready” and inevitably takes you out of your aiming position.
Putting a laser spot on someone carries the same threat without the need to change your aim.