2026 Forest River RiverStone 421FK

New Fifth Wheel in Belleville, Michigan, 48111

$214,675.00
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New 2026 Forest River RiverStone 421FK available in Belleville, Michigan
2026 Forest River RiverStone 421FK - New Fifth Wheel For Sale by National RV Detroit in Belleville, Michigan features Slideout
2026 RiverStone 421FK by Forest River from National RV Detroit in Belleville, Michigan
New 2026 Forest River RiverStone 421FK available in Belleville, Michigan

Unit Specs

  • Stock #09583
  • Year2026
  • ManufacturerForest River
  • Make Forest River
  • ModelRiverStone
  • Floorplan421FK
  • Floorplan LayoutFront Kitchen
    Kitchen Island
    Rear Bedroom
  • Type Fifth Wheel
  • ConditionNew
  • Length44' 0"
  • VIN4X4FRS837T0005320
  • Price $214,675.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Sleeps4
  • Water Capacity (Fresh)79 gal
  • Water Capacity (Black)40 gal
  • Water Capacity (Grey)120 gal
  • Slideouts6
  • Tow/Hitch Weight3635 lbs

Forest River RiverStone fifth wheel 421FK highlights:

  • Kitchen Island
  • Front Kitchen
  • Theater Seats
  • Dual Vanity Sink
  • Stackable Washer and Dryer

 

You will feel right at home in this fifth wheel! The rear private bedroom has a 72" x 80" king bed slide for a good night's rest, a rear large wardrobe with the washer and dryer next to it, and even a dresser with a 40" LED TV. And two can get ready at once in the full bathroom with the dual sink vanity. You can then head to either the desk slide to get some work done or whip up some scrambled eggs on the three burner cooktop at the island in the front kitchen. The kitchen even has a dishwasher for easy clean up and two bar stools at the high top dinette that overlooks the middle living area. Relax each night in true comfort on either the E-Z Glide sofa bed slide or the theater seating across from the entertainment center which has a fireplace and 65" Samsung LED Smart TV to watch your favorite movies!

 

The Forest River RiverStone fifth wheels and toy haulers are luxurious units that have it all! You'll find an automatic six-point hydraulic level-up system to keep your unit in place, and there is preparation for a four-camera observation system. The TravlFi Journey XTR 4G/LTE router and WiFi extender will help you stay connected to the outside world, and you'll never have to overpack again since the Splendid “Astral” stackable washer and dryer will let you clean the small amount of clothes you've brought with you. Another high luxury is the Fischer Paykal dishwasher which will allow you to spend more time enjoying your camp life and less time cleaning up. Each unit is built with a LCI Road Armour suspension system, dual-pane frameless windows, a full docking station, a 200W solar panel, and a BMPro touch control system. 

  • Front Kitchen
  • Kitchen Island
  • Rear Bedroom

2026 Forest River RiverStone 421FK Features


  • Exterior
    Slideout

2026 Forest River RiverStone 421FK Specifications

Dimensions

Height

13' 4"

Length

45' 0"

Width

8' 6"

Weights

Dry Weight

18,331 lbs

GVWR

24,000 lbs

Hitch Weight

3,270 lbs

Payload Capacity

5,669 lbs

Capacities

Refrigerator Capacity

18 cu ft

Sleep Capacity

4

Water Capacity - Black

40 gal

Water Capacity - Fresh

79 gal

Water Capacity - Grey

120 gal

Exterior

# Awnings

2

# Axles

2

# Doors

1

# Slides

5

Hitch

Fifth Wheel

Electrical

# A/C

2

A/C Spec

15,000 BTU High Performance Quiet Cool A/Cs with Heat Pumps

*MFG Specs are for base unit. Certain options may change specifications listed. Please consult dealer for more details. Data is provided by a 3rd party. RVUSA.com cannot guarantee the accuracy of the data presented.

2026 Forest River RiverStone 421FK Literature


Seller Info

National RV Detroit

44700 N I 94 Service Dr
Belleville, MI 48111

Member Since 2009

See 585 Reviews

Unit Specs

  • Stock #09583
  • Year2026
  • ManufacturerForest River
  • Make Forest River
  • ModelRiverStone
  • Floorplan421FK
  • Floorplan LayoutFront Kitchen
    Kitchen Island
    Rear Bedroom
  • Type Fifth Wheel
  • ConditionNew
  • Length44' 0"
  • VIN4X4FRS837T0005320
  • Price $214,675.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Sleeps4
  • Water Capacity (Fresh)79 gal
  • Water Capacity (Black)40 gal
  • Water Capacity (Grey)120 gal
  • Slideouts6
  • Tow/Hitch Weight3635 lbs

Email Seller

Request More Info on this 2026 Forest River RiverStone 421FK Offered for sale by National RV Detroit
National RV Detroit
National RV Detroit

44700 N I 94 Service Dr
Belleville, MI 48111

Phone: Click to Call

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2026 Forest River RiverStone 421FK Gallery

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New 2026 Forest River RiverStone 421FK available in Belleville, Michigan
2026 Forest River RiverStone 421FK - New Fifth Wheel For Sale by National RV Detroit in Belleville, Michigan features Slideout
2026 RiverStone 421FK by Forest River from National RV Detroit in Belleville, Michigan
New 2026 Forest River RiverStone 421FK available in Belleville, Michigan