Dunno, just got it, in the context of an urban dweller that can't shoot in his yard and has 3 kids in activities so no time to drive out and shoot yet. Basement commando is the best imitation I have so far.
That stepped section results in 2 fingers on the front fore end and the other two on the transition/closer to the mag well, when carried flat but being they are the pointer and middle finger doesn't feel weird being they are longer fingers, this is just a first impression as noted. Also it was mentioned to me that if you carry it angle down and tucked into your armpit that stepped section is resting on your fingers more naturally.