The Ruger BX-1 rotary magazine is constructed of plastic with a steel feed and black finish. It is compatible with your .22LR Ruger 77/22 Rifle, 10/22 Rifle, SR-22 Rifle, and .22LR Ruger American Rimfire rifle. It also comes in a pack of three.
Specifications:

Caliber	22 LR
Capacity	10
Finish	Black
Model	77/22, 10/22, SR22
Material	Plastic
Type	Rifle
Model Fit	77/22, 10/22, SR-22, American Rimfire Rifle
Brand Fit	Ruger
Max Capacity	10