This Ruger 10/22 10 Round Magazine is a factory original straight from Ruger for your Ruger 10/22. Factory original replacement parts are made to the exact same standards as your original parts. Pick up another factory 10 round magazine for the range or field, and save time reloading ammunition! Rugged polymer and metal feed keep this magazine feeding properly for years. The feed and cycling in this magazine stand up to thousands upon thousands of rounds without jamming or breaking. This factory rotary magazine is superior to all stacking magazines because the rounds have their own feed slot. The stacking magazines have issues because the rims of the rounds can catch on one another and jam up the system.