The Steyr HS50 magazine is a standard factory replacement magazine. This magazine is designed to be compatible with HS50 models chambered in the popular .50 BMG cartridge holding 5 rounds of ammunition. The magazine is made from high quality alloy and features a black finish. The most important aspect of this magazine is the fact that it is made by Steyr so you can rest assured that the magazine will meet and exceed the specifications and tolerances set forth by the factory engineers.