This genuine Ruger® factory magazine with Ruger® logo has been tested and has proven to feed as reliably as the standard BX-1 10-round Ruger® rotary magazine. This level of reliability was achieved by setting up the stainless steel feed lips to present cartridges into the action at a 30 degree angle. A stainless steel constant force roll spring contributes to this reliability, too. Finally, the follower was designed for "anti-tilt" characteristics to keep cartridges from getting out of alignment and hanging up inside the magazine. And when the BX-25 needs cleaning, you just take it apart and clean it with simple screw disassembly. Ruger brand BX-25 magazines will work 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. . See more magazines and other accessories at our Ruger 10/22 Home Page.