A support frame assembly for supporting a plow, or another front-mounted implement, on a small vehicle such as an all-terrain vehicle (“ATV”) is provided. The frame assembly comprises a front portion and a rear portion. The front portion is typically raised with respect to the rear portion, allowing the plow to be pivotally attached to the front of the frame assembly at a higher location. The rear portion comprises a locking mechanism allowing the frame assembly to be easily mounted to the underside of the vehicle. A releasing mechanism, operatively connected to the locking mechanism, allows for the easy removal of the frame assembly from the vehicle.