3D-MC2 GRADER Comes in Single-Antenna and Twin-Antenna (shown) configurations. Sign in or sign up for myTopcon to view this page: Sign In Sign Up COMPONENTS GX-55 MC-A1 MC-R3 Mainfall Sensor MC2 Sensor RELATED PRODUCTS 3D-MC Grade Control Software DOCUMENTS 3D-MC - Reference Guide 3D-MC - Reference Guide Download