This is a factory 9mm 10-round magazine for Walther PDP Full Size pistols. Delivering features and performance that are a cut above the rest, Walther's PDP Full Size pistols are rapidly becoming a favorite among top shooters and enthusiasts all over America. These 10-round magazines feature the maximum factory capacity and durable stainless steel construction. Ideal for competition, target shooting, or home defense, these magazines will help you get rounds reliably downrange. DO NOT use without adapter on PDP Compact, Q5 Match, Q4, or PPQ, or this WILL result in damage to your pistol's ejector.