Who would have thought a “high-rib” sight would exist for the AR-15 platform? This all came to fruition for me as I was doing some research for one my over-under shotguns. In the midst of my search, I came across the high-rib setup, by complete random chance, designed and manufactured by Toni System in Italy. Leave it to the Italians to design something this wild. Needless to say, I immediately fell in love and knew I had to use it to build a rifle with.