koti wrote:My bad.......It is selector switch indeed.....
Can anyone address the full-auto behavior if Insas AR in the second video?
The second video doesn't show any firing in full auto mode. All they're firing is single shot and 3 round burst, which is what the capabilities of the INSAS AR are. You can see in the video before they start firing in the prone position, the chap in charge even yells to fire in single shot mode.
If you're referring to the first part of the video where the guys fire a mixture of single round and three round bursts, this is possible in two different ways.
The first way is to rotate the selector switch with the thumb to flip between single shot mode and 3 round burst mode. Like I mentioned above, the INSAS ergonomics (also true for M16, FN-FAL, some HKs etc.) allows the user to rotate the switch while keeping the rifle pointed at the target and a finger ready to fire on the trigger, which is not possible in an AK47.
The second way: It is possible to fire single round or two rounds even when you're in 3 round burst mode, if you pull your finger off the trigger quick enough. That's probably the technique they're using in the video.
Just to clarify matters, when you're in three round burst mode, if you hold down the trigger long enough, it will fire three rounds and then stop. You'll need to release and pull the trigger again if you want it to fire some more. This is not the same as full-auto mode, which is where it will keep firing as long as the trigger is depressed. The INSAS AR doesn't have full auto mode, but the INSAS LMG does. This is because the Indian Army specified that this is what they wanted in the different models.