The Ruger magazine is a standard factory replacement magazine. This magazine is designed to be compatible with AICS pattern rifles chambered in .350 Legend and contains 5 rounds of ammunition. The magazine is made from high quality materials and features a teflon finish. The most important aspect of this magazine is the fact that it is made by Ruger 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.