This is a factory 5-round magazine for Ruger M77/357 in .357 Magnum
Ruger’s powerful M77 series of bolt-action rifles delivers magnum firepower in a durable, lightweight rifle that goes anywhere you go—and feeds from Ruger’s patented rotary magazine design …
These 5-round factory magazines feature lightweight polymer construction, steel-reinforced feed lips and heat-treated internal spring wire. These are standard factory magazines, engineered to the same exacting specifications as your original factory equipment for optimum fit and function.
Grab some spare magazines for your M77/357 rifle today!