9-Round, 22 WMR, 17 HMR Caliber Magazine with Steel Feed - Black Plastic. Fits the Ruger 77/17, 77/22 WMR, American Rimfire and Ruger Precision Rimfire. 

WARNING: Discharging firearms in poorly ventilated areas, cleaning firearms, or handling ammunition may result in exposure to lead and other substances known to the State of California to cause birth defects, reproductive harm, and other serious physical injury. Have adequate ventilation at all times. Wash hands thoroughly after exposure