RetArmySgt
Glad to be back.
If you have to have a pistol grip shotgun, it makes sense. I like the innovation, but it does have mall ninja written all over it.
What makes more sense and is easier to aim with would be a vertical grip on the pump, not an item that puts your hand in the way of the sight. Or a leather strap that connects to both sides of the pistol grip that you can put behind your sholder (like seen on Uzi's).