Harris Engineering Number 2R Radiused Flange Nut. OpticsPlanet Inc is an Authorized US Distributor for Harris Engineering Bipods. Has radiused flange for mounting to wood forends under magazines or gas tubes. Package Contents: Harris Engineering Number Radiused Flange Nut 2R We offer the complete line of Harris Engineering Bipods. For our complete selection of products by Harris Engineering on sale please visit our Harris Engineering page. For more Bipod Accesories please visit our Bipod Accesories store section. Harris Engineering Number 2R Radiused Flange Nut