2026 Forest River RiverStone 421FK

New Fifth Wheel in Mesa, Arizona, 85213

$158,992.00
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New 2026 Forest River RiverStone 421FK available in Mesa, Arizona
2026 Forest River RiverStone 421FK - New Fifth Wheel For Sale by General RV Center in Mesa, Arizona
2026 RiverStone 421FK by Forest River from General RV Center in Mesa, Arizona
New 2026 Forest River RiverStone 421FK available in Mesa, Arizona

Unit Specs

  • Stock #336377
  • Year2026
  • ManufacturerForest River
  • Make Forest River
  • ModelRiverStone
  • Floorplan421FK
  • Type Fifth Wheel
  • ConditionNew
  • Length45' 0"
  • Width8' 6"
  • Height13' 4"
  • VIN4X4FRS831T0005247
  • MSRP $227,513.00
  • Sale Price $158,992.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Sleeps4
  • Slideouts6
Experience the pinnacle of luxury and comfort with the 2026 Forest River Riverstone 421FK. This exquisite fifth wheel is designed to elevate your adventures with its thoughtfully crafted layout and premium features. At 45 feet in length, it offers ample space for relaxation and entertainment. The front kitchen is a chef's dream, equipped with a full-size electric refrigerator, convection cooking, and a four-burner cooktop, making meal preparation a delight. The center living area becomes a cozy haven with its theater sofa and E-Z Glide sofa bed, perfect for unwinding or hosting friends. The rear bedroom is a sanctuary featuring a king bed, with an option for a queen, and a convenient washer/dryer prep area. Enjoy the spaciousness of the center bath with its elegant plastic and glass shower. With a generous cargo capacity of 5,669 pounds, you can bring along all your essentials for extended journeys. The dual 16-foot awnings provide ample outdoor space to enjoy the scenery, while the automatic heater ensures comfort in any weather. Whether you're embarking on a weekend getaway or a cross-country adventure, the Riverstone 421FK promises a luxurious and unforgettable experience. For more details, visit your nearest General RV dealership.

View a video of this 2026 Forest River RiverStone 421FK RV on YouTube!

2026 Forest River RiverStone 421FK Features


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

General RV Center

2260 E Main Street
Mesa, AZ 85213

Member Since 2025

See 20 Reviews

Unit Specs

  • Stock #336377
  • Year2026
  • ManufacturerForest River
  • Make Forest River
  • ModelRiverStone
  • Floorplan421FK
  • Type Fifth Wheel
  • ConditionNew
  • Length45' 0"
  • Width8' 6"
  • Height13' 4"
  • VIN4X4FRS831T0005247
  • MSRP $227,513.00
  • Sale Price $158,992.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Sleeps4
  • Slideouts6

Estimated Payment-

Interest Rate % *(W.A.C.)
Term Years
Down Payment $
*W.A.C. = With approved credit

Email Seller

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

2260 E Main Street
Mesa, AZ 85213

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 Mesa, Arizona
2026 Forest River RiverStone 421FK - New Fifth Wheel For Sale by General RV Center in Mesa, Arizona
2026 RiverStone 421FK by Forest River from General RV Center in Mesa, Arizona
New 2026 Forest River RiverStone 421FK available in Mesa, Arizona