Feature • Flexible Cant Options: 0 MOA for Standard Distance Shooting, 20 MOA Cant Provides Extra Elevation for Long‑Range Shooting • Secure Scope Clamping: Four Screws per Ring Keep the Scope Firmly Mounted for Stable and Repeatable Accuracy • Optimal AR Sight Height: 38mm/1.5in Height from Base to Ring Center Supports Comfortable Eye Alignment on AR Platform Rifles • Strong Picatinny Interface: 21mm Picatinny Mount with Dual Crossing Bolts Ensures a Solid and Reliable Rail Connection • Recoil-Resistant Design: Anti-Retreat Bar Prevents Mount Movement Under Recoil for Consistent Shooting Performance What are 0 MOA and 20 MOA?0 MOA: A 0 MOA mount does not have any built-in elevation. When a scope is mounted on a 0 MOA mount, the optical axis of the scope remains parallel to the barrel of the firearm. This means that the scope's reticle is aligned with the bore axis, and no additional upward or downward adjustment is introduced.20 MOA: A 20 MOA mount, on the other hand, has a built-in upward cant or angle of 20 MOA. When a scope is mounted on a 20 MOA mount, the optical axis of the scope is angled slightly upward relative to the bore axis. This introduces additional elevation in the scope's point of impact. The purpose of a 20 MOA mount is to provide increased elevation adjustment capability for long-range shooting or compensating for bullet drop at extended distances. Size Specifications Specification Details Ring Dia: 30 mm Height: 62 mm / 2.4 in Central Height: 38 mm / 1.5 in (Bottom to Center) Length: 139 mm / 5.5 in Material: 6061 - T6 Aluminum Alloy Weight: 155 g / 5.5 oz Mount: Picatinny Finish: Black Matte / Coyote FDE Items in the Package: T15 Torx Wrench, Retail Package Video