The GBRS Group 2.91 FTC Magnifier Mount leverages Unity Tactical's revolutionary Flip-to-Center technology to elevate any magnifier to the 2.91" height for seamless compatibility with GBRS Group Hydra Mounting Systems.GBRS Group 2.91 FTC (Flip-to-Center) Magnifier MountOMNI magnifier compatibility2.91" height to optic center lineForce-to-overcome mechanism with QD lever rail mountConstructed of 7075 T6 aluminum with Type III hardcoat anodized finishLightweight at 5.2ozFDE (Flat Dark Earth) finishThis innovative design eliminates the need for traditional flip-to-side placement by tucking the magnifier below the optical sight plane within the weapon's receiver footprint when stowed providing magnification benefits when needed without obstructing sight pictures.