This replacement or spare magazine is compatible with your Ruger 10/22. It is constructed of impact-resistant polycarbonte with injection molded mag follower & mag spring formed from heat treated chrome silicone wire. Made in the USA. Type Detachable Model Ruger 10/22 Finish Smoke Series Replacement Magazine Caliber 22 LR Capacity 32 Material Polycarbonate Brand Fit Ruger Model Fit 10/22