For more than a century, the Amateur Trapshooting Association has provided American shooters with the opportunity to hone their clay target skills. This week we head to Sparta, Ill., for an in-depth look at the ATA. Umarex in Germany makes a licensed .22 version of the Heckler & Koch 416, and Assistant Editor Angus K. McClellan tests it in this week’s “Rifleman Review.” Used by Marine Parachutists and the First Special Service Force, the Johnson Model of 1941 is one of the most unusual light machine guns of World War II.