series red dot sights, without restricting your scope base and ring options. Short enough not to interfere with rings, turret, or scope objective. Rail mounts at any angle on the scope tube and positions alternate sight close to the scope axis, so switching. between main and secondary sights requires minimal head movement. Made of lightweight, precision machined aluminum and hardcoat anodized for added strength to withstand the pounding of recoil without losing adjustment. Specifications: Designed To Work With All Scope objective Lens, 56mm Or Larger CNC Machined, 6061 Aircraft Grade Aluminum Type 2 Class III Hard coat Anodized Rock Solid, Will Hold Zero Even With .50BMG Lightweight, Only 1oz 100% USA Made