SK is excited to announce the latest addition to its family of .22 LR ammunition: SK Semi-Auto Rifle. New for 2020 SK?s Semi-Auto Rifle is designed to outperform replace and eventually retire all other inferior semi-auto ammunition offerings currently crowding the market. It?s built to deliver pinpoint accuracy while functioning flawlessly through any 10/22 style firearms AR?s 597?s 64?s and more