Here are the rifle rack plans for free- I came up with to display three of my rifles on the wall. It is simple and does not hide the rifle. It is basically two boards with pegs in them. One board has the pegs lower by one inch so the rifles set level. It is not secure, and will not work with a trigger lock, so you have to evaluate your situation before using. That is why I call it a display rack. More guns can be added by lengthening the boards and adding pegs with 5″ on center between them.
The boards are 3″ wide, can be 1/2″ to 3/4″ thick. I planed to use oak, but wanted to try out the spacing first so I used some 15mm baltic birch ply I had. It came out nice, so I just stained (Minwax Special Walnut) and lacquered it. I wanted a reddish look to match the rifle stocks. The dowel pegs are 5/8″ hardwood dowel from Home Depot cut 2 1/2″ long and rounded over on one end. They are also flattened on top 1″ This is 3/4″ in from the end (see picture). This is important. It acts as a slight cradle. Without it, the rifle can be easily brushed off the rack by accident.
I used Forstner bits to drill flat bottom holes for the pegs and for mounting screws. Holes are drilled 3/8″ deep. Oak buttons cover the screw holes. 5/8″ holes for the pegs and 1/2″ for the screws. The boards are mounted on the wall 16″ apart on center to match the studs in the wall. I find that is a good spacing for the carbines I have, even when using wall anchors. When gluing in the pegs, make sure you have the flat facing up. Here is the pdf plan for drilling the holes Rifle Rack Plan