Really? It looks like the strongest of the bunch to me.

Note the position of the trunions (pivot point) on the K-gun design and also the Italian actions.

There simply isn't much torque to resist on firing, compared to a tall action with a classic style hinge pin.

Beretta gets away with two little conical pins, and it works just fine.

The Krieghoff is certainly better bolted than 680 series Beretta, and the Beretta is more than adequate.

"The price of good shotgunnery is constant practice" - Fred Kimble