This GSG magazine is a standard factory replacement magazine. This magazine is designed to be compatible with GSG-16 models chambered in the popular .22 Long Rifle cartridges and holds 10 rounds of ammunition. The magazine is made from high quality polymer and features a matte finish. The most important aspect of this magazine is the fact that it is made by GSG so you can rest assured that the magazine will meet and exceed the specifications and tolerances set forth by the factory engineers. You can be all but certain that this magazine will fit perfectly and function flawlessly the same as with the magazine(s) that shipped with your firearm. - GSG-16 Magazine Specifications and Features: - Factory Magazine - .22 Long Rifle - 10 Rounds - Polymer Body - Quality Follower - Quality Magazine Spring - Black Finish - Compatable with the GSG-522PK