Shop › MAG JTS M12AR 12GA 10RD BLK MAG JTS M12AR 12GA 10RD BLK $29.99 JTS Group Magazine, 12 Gauge 3", 10 Rounds, Fits JTS M12AR, Polymer, Black JARMAG10 Add To Cart Added! JTS Group Magazine, 12 Gauge 3", 10 Rounds, Fits JTS M12AR, Polymer, Black JARMAG10