The EBR chassis system is available for M1A/M14, M1 Garand, and Mini 14 rifles, featuring a machined aluminum physique with an anodized complete for enhanced accuracy and reliability. Its rigidity reduces vibration for increased eye reduction and sight radius, as well as larger mount positions that increase eye relief/sight radius. https://marcowpbna.ampedpages.com/mossberg-590-magpul-stock-an-overview-58962778