The V4 filament drive, a central part of the V4 extruder, interfaces with the extruder motor. It is made of ABS plastic and includes all hardware except the drive gear.
Drive gears are sold separately.
You may download the 3D Models here-
Ultra One, M3, M2 F/G- M3/Filament Drive.STL at master · MakerGear/M3 · GitHub