Toni System is a firearms components manufacturer with a focus on competition parts for not only shotguns, but also centerfire-rifles and pistols. As soon as I found out about them, I immediately researched the company and not only did I find the high-rib, I also found many other awesome components for the AR-15 platform. I made a list and went to town ordering from them everything I could for a complete build which would eventually take over a month to arrive from Italy.