The FANGS™ Bumper for Pint V2.  It's not hard to assemble, as it uses the same screw mount locations as the stock bumper. Watch the video for a simple overview of how it works.

IMPORTANT!  For ease of fitting, loosen the top 4 screws that hold the rails to the controller (under the footpad).  This will allow the rails to shift a bit to accommodate the bumper. Tighten them back up when the bumper is on.