I purchased one of the rifle rod starter sets (10 rods with velcro) for $40 on Amazon last month. They do help, but are expensive for what you get. Unfortunately ARs with optics take up a bunch of depth in the safe, so I didn't get multiple layers like they show in their videos, but getting guns in and out is much easier since I don't have to lift the stock over the lip of the safe. The other benefit was using one of the shelves to raise the shorter rifles up, which gave more storage for other items.

I'm a huge fan of their handgun hangers, those work great!