When shooting at extreme ranges, many shooters find their riflescope lacks the necessary elevation travel. The Nightforce Wedge Prism is offered in 2 variants, 50 MOA or 100 MOA, that install forward of the riflescope to increase the effective elevation travel. The Wedge Prism optically shifts the incoming image to the riflescope by a precise elevation value, which directly adds to the available elevation travel within the riflescope. Key Features: 50 MOA/14.5 MRAD* or 100 MOA/29.1 MRAD elevation shift variants available for extreme long-range use Quick Detach MIL-STD 1913 attachment ensures consistent elevation shift when installed in the field Compatible with al Mfg: Nightforce