The Ruger 77/22 Hornet Magazine is a factory original replacement part from Ruger. Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts which guarantees excellent fit and reliable operation. This Ruger 77/22 Hornet Magazine features a polymer body with metal components and a polymer follower. The Ruger rotary magazine is superior to conventional feeding systems because each cartridge lies in its own channel in the magazine. This arrangement prevents jamming by eliminating the overlap between cartridge rims found with stack-type magazines. Keeping a few extra factory magazines around is never a bad idea; extra magazines save loading time at the range and also serve as a backup for those days when you simply cannot remember where you put your primary magazine.