2026 Forest River RiverStone 421FK

New Fifth Wheel in Middlebury, Indiana, 46540

$158,992.00
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New 2026 Forest River RiverStone 421FK available in Middlebury, Indiana
2026 Forest River RiverStone 421FK - New Fifth Wheel For Sale by Royal RV Center in Middlebury, Indiana features Slideout
2026 RiverStone 421FK by Forest River from Royal RV Center in Middlebury, Indiana
New 2026 Forest River RiverStone 421FK available in Middlebury, Indiana

Unit Specs

  • Stock #R005387
  • Year2026
  • ManufacturerForest River
  • Make Forest River
  • ModelRiverStone
  • Floorplan421FK
  • Floorplan LayoutFront Kitchen
    Kitchen Island
    Rear Bedroom
  • Type Fifth Wheel
  • ConditionNew
  • Length44' 0"
  • VIN4X4FRS836T0005387
  • Price $219,529.00
  • Sale Price $158,992.00
  • 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
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Forest River RiverStone 421FK Fifth Wheel for Sale in Middlebury, IN

If you're searching for a luxury fifth wheel in Indiana with a residential front kitchen layout and high-end amenities, the Forest River RiverStone 421FK is a top-tier choice. Available now at Royal RV Center in Middlebury, IN, this model is built for full-time living, extended stays, and ultimate comfort.

Front Kitchen with Residential Design

The front kitchen layout offers a true home-like cooking experience:

  • Large kitchen island with prep space
  • Three-burner cooktop
  • Dishwasher for easy cleanup
  • High-top dinette with bar stools overlooking the living area
  • Plenty of cabinetry and storage

Spacious Living Area

Relax in the center living room featuring:

  • Theater seating across from the entertainment center
  • E-Z Glide sofa bed for additional sleeping
  • Fireplace and 65" Samsung Smart TV
  • Open layout perfect for entertaining

Private Rear Bedroom Retreat

Enjoy a comfortable and quiet space with:

  • 72" x 80" king bed slide
  • Large rear wardrobe
  • Dresser with 40" LED TV
  • Stackable washer and dryer

Spa-Like Bathroom

The full bathroom includes:

  • Dual vanity sinks
  • Spacious shower
  • Plenty of storage for linens and essentials

Work-From-Anywhere Ready

A dedicated desk slide provides space to work remotely while traveling.

Built for Luxury & Full-Time Living

  • Six-point hydraulic auto-leveling system
  • LCI Road Armour suspension
  • Dual-pane frameless windows
  • Full docking station

Smart Technology & Off-Grid Capability

  • BMPro touch control system
  • TravlFi 4G/LTE router with WiFi extender
  • 200W solar panel
  • Prep for four-camera observation system

High-End Residential Features

  • Fisher Paykel dishwasher
  • Premium appliances and finishes
  • Designed for long-term comfort and durability

Available at Royal RV Center

Visit Royal RV Center in Middlebury, Indiana, proudly serving Indiana, Michigan, Ohio, and beyond, to explore the Forest River RiverStone 421FK fifth wheel and experience luxury living wherever your travels take you.

   
  • 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

Royal RV Center

14441 US HWY 20
Middlebury, IN 46540

Member Since 2020

See 170 Reviews

Unit Specs

  • Stock #R005387
  • Year2026
  • ManufacturerForest River
  • Make Forest River
  • ModelRiverStone
  • Floorplan421FK
  • Floorplan LayoutFront Kitchen
    Kitchen Island
    Rear Bedroom
  • Type Fifth Wheel
  • ConditionNew
  • Length44' 0"
  • VIN4X4FRS836T0005387
  • Price $219,529.00
  • Sale Price $158,992.00
  • 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

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 Royal RV Center
Royal RV Center
Royal RV Center

14441 US HWY 20
Middlebury, IN 46540

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 Middlebury, Indiana
2026 Forest River RiverStone 421FK - New Fifth Wheel For Sale by Royal RV Center in Middlebury, Indiana features Slideout
2026 RiverStone 421FK by Forest River from Royal RV Center in Middlebury, Indiana
New 2026 Forest River RiverStone 421FK available in Middlebury, Indiana