The JMX-1 is the Ruger factory nine-round magazine for the 77/17, 77/22 Magnum, 96/22 Magnum and 10/22 Magnum rifles.
Based on Ruger's popular rotary magazine design the magazine features a steel follower and takes both .17HMR and .22WMR rounds.
You can’t go wrong with having extra magazines, whether it’s for fast loading at the range or in the field. Or, as a backup in case of loss, damage or muddy puddle encounters.