Someone at Beretta wasn't doing their homework. Quite a few comp shooters use the forearm ridge as a reference point to position the index finger to point at the target (Check out the shooter in the Winchester link provided by
LanceOregon). It's something I picked-up watching NSSA world champ Alan Clark many years ago. Having the forearm ridge at an angle from the bore is a major negative point with the A4300 Xplor Unico. I agree with my friend,
BigJimP, it's also the front runner in the ugly dog contest, but his Benelli is still in the running.