Yankee Hill Machine Company FWS-I Thermal Optic Riser Features The Yankee Hill Machine FWS-I Thermal Optic Riser raises a compatible thermal weapon sight to the correct height over the host s Picatinny rail which helps shooters achieve a consistent and comfortable cheek weld. Proper sight height is especially important with thermal optics since many units are mounted forward of the receiver and need precise alignment with the shooter s eye. This riser is built from durable materials designed to maintain zero even under the recoil and handling conditions typical of a duty or hunting rifle. Yankee Hill Machine engineers its mounting accessories to tight tolerances so they integrate without play or shift once torqued down. Thermal optic users often need dedicated risers like this one because standalone thermal units are not always designed with the same mounting height as traditional day optics. Getting the height correct reduces the need for an awkward head position and speeds up target acquisition in low light or no light conditions. This riser is a straightforward solution for shooters building out a dedicated thermal setup on an AR platform rifle. Shooters configuring a thermal optic system can find the Yankee Hill Machine FWS-I Thermal Optic Riser for sale at GrabAGun. Yankee Hill Machine Company FWS-I Thermal Optic Riser Specifications Manufacturer: Yankee Hill Machine Company Model: FWS-I Thermal Optic Riser Type: Optic Riser Mount Available At: GrabAGun