2025 Forest River RiverStone 421FK

Used Fifth Wheel in Fort Worth, Texas, 76140

$119,995.00

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Used 2025 Forest River RiverStone 421FK available in Fort Worth, Texas

2025 Forest River RiverStone 421FK - Used Fifth Wheel For Sale by McClain's RV Fort Worth in Fort Worth, Texas features Bike Rack, Generator, Microwave, Sound Bar, Inverter

2025 RiverStone 421FK by Forest River from McClain's RV Fort Worth in Fort Worth, Texas

Unit Specs

Stock #P15633
Year2025
ManufacturerForest River
Make Forest River
ModelRiverStone
Floorplan421FK
Type Fifth Wheel
ConditionUsed
Length45' 0"
Width8' 6"
Height13' 4"
VIN4X4FR5836S0004982
Price $119,995.00
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Sleeps4
Water Capacity (Fresh)79 gal
Water Capacity (Black)40 gal
Water Capacity (Grey)120 gal
Air Conditioners2
A/C Spec15,000 BTU High Performance Quiet Cool A/Cs with Heat Pumps
Refrigerator Capacity18 ft³
Slideouts5
Payload Capacity5220 lbs
Dry Weight18,780 lbs
Tow/Hitch Weight3270 lbs
# Axles2

Looking to buy a 2025 Forest River RiverStone Fifth Wheel RV?

The 2025 RiverStone 421FK brings upscale, residential-style comfort to the RV world — designed for folks who want to travel without sacrificing home conveniences. Stretching 45 feet in total, this fifth-wheel features five slide-outs that dramatically expand living space, giving you a roomy floorplan ideal for long trips or full-time living.

Up front is a chef-ready kitchen centered around a large island, complete with a three-burner cooktop, 18-cu-ft French-door refrigerator (with ice maker), solid-surface countertops, a residential faucet and deep stainless steel sink — perfect for preparing full meals. The central living area offers a cosy lounge with theatre-style seating or a sofa-bed slide, plus an entertainment center with a fireplace and a 65″ LED Smart TV for nights in.

At the rear, the private bedroom includes a 72" × 80" king bed slide, a large wardrobe (with washer/dryer hookup), and a dresser with a 40″ LED TV — giving the feel of a motorhome suite. The full bathroom features a dual-sink vanity for easy two-person use.

On the outside, dual electric awnings with LED lighting, a high-insulation build, dual-pane frameless windows, and large under-bed and pass-through storage add practicality and comfort.

Overall, the 421FK delivers a refined, home-like atmosphere, spacious interior, and high-end amenities — ideal for couples or small families who want to travel in comfort and style.

2025 Forest River RiverStone 421FK Features

Appliances
Dishwasher, Dishwasher, Dryer, Dryer, Furnace, Furnace, Microwave, Microwave, Oven, Oven, Refrigerator, Refrigerator, Washer, Washer, Water Heater, Water Heater
Electrical
Generator, Generator, Inverter, Inverter, Slide-out Battery Tray, Slide-out Battery Tray, Solar Panel, Solar Panel, Solar Panels, Solar Panels
Equipment
Bike Rack, Bike Rack, Heat Pump, Heat Pump, LED Lights, LED Lights, Smart TV, Smart TV, Sound Bar, Sound Bar, TV, TV
Exterior
Awning, Awning, Hitch, Hitch, Ramp, Ramp, Roof Deck, Roof Deck, Slideout, Slideout
Interior/Furnishings
Ceiling Fan, Ceiling Fan, Fireplace, Fireplace, Kitchen Sink, Kitchen Sink, Toilet, Toilet

2025 Forest River RiverStone 421FK Specifications

Dimensions

Height

13' 4"

Length

45' 0"

Width

8' 6"

Weights

Dry Weight

18,780 lbs

GVWR

24,000 lbs

Hitch Weight

3,270 lbs

Payload Capacity

5,220 lbs

Capacities

Refrigerator Capacity

18 cu ft

Sleep Capacity

Water Capacity - Black

40 gal

Water Capacity - Fresh

79 gal

Water Capacity - Grey

120 gal

Exterior

# Awnings

# Axles

# Doors

# Slides

Hitch

Fifth Wheel

Electrical

# A/C

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.