Polaris Sportsman Front Rack ExtenderPolaris Sportsman Front Rack Extender 2879890 This Front Rack Extender adds cargo security and versatility to a Sportsman XP. This strong, durable 4. 5 in. high Polaris Rack Extender features injection molded nylon construction and it is engineered specifically for the Sportsman XP four wheeler. It mounts quickly on the Polaris ATV's front cargo rack and will work in conjunction with Polaris accessories such as the Gun Scabbard Mount(sold separately).