The EGW Browning X-Bolt Long Action Scope Base provides a precision mounting platform with 0 MOA cant for optimal scope alignment on long action rifles.EGW Browning X-Bolt Long Action HD Scope Base0 MOA cant for precise scope mountingHeavy Duty (HD) construction for durabilitySpecifically designed for Browning X-Bolt long action riflesProfessional-grade machining and materialsEssential for hunters and precision shooters who demand reliable accurate scope mounting on their Browning X-Bolt long action rifles.