This is the Marlin 4 round .17HMR and .22WMR magazine for all Marlin bolt actions, including the Marlin 882, 917, 982, XT-17 and XT-22 rifles.
Made from nickel plated steel to match the rifle finish this is a genuine Marlin factory replacement.
Remington part number: 71923
Marlin part number: 405446