Can someone please school me on why just about every photo of an AR shooter you see appears to be trying to wrap his forend hand around the gas block???? Does this new rifle/carbine grip mode accomplish something??? I mean other than looking "tacticool" what does this do for you???? And finally, whether it does something or not do we all need to join in and hold all of our rifles this way, or is it limited to the AR platform???? Cant figure it out and I am worried I might be missing something here.....