The five-shot magazine delivered with the rifle is the single-stack Accuracy Global style. The magazine release performs like an M14, but more optimistic in sense. It's realistic barrel lifetime as well as high ballistic efficiency of the available high quality projectiles enables it to maintain velocity at prolonged ranges. https://marlin1895sbl45-70govt60836.activablog.com/35117945/facts-about-magpul-mbus-sights-ar-15-revealed