The Warranty is 5 years.

The parts are no more expensive than any other gun. But I will tell you that Benelli is NOT KNOWN FOR SPEEDY PARTS ORDERS. Believe it or not it takes less time for you to send a gun to them, have it repaired, and get it back than it does to order a simple replacement, drop in part. Benelli absolutely sucks at getting parts out in a timely manner.

As far as the screw thing goes I don't know. We have almost zero novas in for repairs at the shop and I have never really had the time to just sit down and fiddle with one.