Yeah. I used them back when I competed in Service Rifle. They were required, IIRC. Since you can’t holster a rifle and the range officer can’t walk the line and inspect each competitor’s rifle, chamber flags make sense in that situation. But for transporting my guns from home to the range? I don’t see the point.Yup. But I do like them at ranges with other people so everyone can visually verify each other from a distance when going down range.