This is a factory 10-round (M10 style) magazine for Ruger Mark II pistols
Bill Ruger launched his company based on a rimfire pistol he built in his garage—that went on to set the gold standard for accuracy, reliability, and value that simply can’t be beat. They’re the most popular rimfire handguns in the world. That’s thanks in no small part to their ultra-reliable factory magazines …
These 10-round magazines are designed exclusively for use with Ruger Mark II pistols (featuring small, M10 style baseplate) and WILL NOT function with 22/45 Mark II, or any other Ruger rimfire pistols. Crafted from durable blued steel with wide side cuts and an easy-to-use reloading button.
Engineered to the same exacting standards as your original factory equipment, these new factory replacement magazines are an excellent upgrade for your Mark II.