As I was trying to figure out why a person would want to add complications to defensive shooting, all that came to mind is Why? You could just take it apart and put evert thing in separate pockets! Looks like someone who is less skilled with a hacksaw than me just hacked the lower part of the grip off and added some flimsy metal as a trigger guard and hinge. But there are people who will buy it so the guy will make money at it... Another solution to a problem that doesn't exist, like so many other firearms "upgrades". I can make lots of accessories and convince the uninformed that it solves a problem that nobody has ever actually had. Snake Oil cures every ailment that you never had to begin with...
G2