The Walther magazine is a standard factory replacement magazine. This magazine is specifically designed for the Walther P99 model chambered in .40 Smith & Wesson. The magazine is designed to hold 10 rounds of ammunition. The magazine is constructed from steel and is made to Walther's exact specifications and tolerances using the same manufacturing and materials as found with your original firearm ensuring perfect fit and operation. - Specifications and Features: - Walther 2796503 - .40 Smith & Wesson - 10 Rounds - Polymer Base Plate - Stainless steel magazine body - Matte Black - Fits: - Walther P99