I found that storing/displaying them horizontally took up way too much room, and limited the number of rifles I could put in the rack. So my rack consists of a 2 X 6 on the floor, and a notched 2 x 4 on the wall for the butt ends, because I store them vertically and muzzle down. Side by side, they require only a fraction of the space, I don't get oil weeping into the wood which is particularly bag when stored on their butts, and I can get them all on one wall of my gun room. My bags and horns hang from pegs above the rifles/guns.