These are factory Ruger magazines.
Three BX-10 Ten Round, .22 LR Caliber Magazines with Steel Feed – Black Plastic. Works with any factory original 10/22 Rifle, SR-22 Rifle, 22 Charger Pistol, .22 LR Ruger American Rimfire Rifle and .22 LR Ruger 77/22 Rifle.
These are sold and shipped as loose bulk. They are not in retail packaging.