Introducing the 2026 Forest River RV Sierra 4003MB, a fifth-wheel designed for families and adventure seekers alike. With a generous length of 42.75 ft and the ability to sleep 8, this RV is perfect for creating lasting memories on the road. Enjoy the comfort of a 30,000 BTU air conditioning system and 40,000 BTU heater, ensuring you stay cozy in any climate. The spacious interior layout, complemented by four slides, offers ample room for relaxation and entertainment. With a dry weight of 12,609 lbs and a GVWR of 15,500 lbs, it's designed for easy towing. Schedule your tour today!

Introducing the 2026 Forest River RV Sierra 4003MB, a fifth-wheel designed for families and adventure seekers alike. With a generous length of 42.75 ft and the ability to sleep 8, this RV is perfect for creating lasting memories on the road. Enjoy the comfort of a 30,000 BTU air conditioning system and 40,000 BTU heater, ensuring you stay cozy in any climate. The spacious interior layout, complemented by four slides, offers ample room for relaxation and entertainment. With a dry weight of 12,609 lbs and a GVWR of 15,500 lbs, it's designed for easy towing. Schedule your tour today!