2025 Forest River RiverStone 421FK

Used Fifth Wheel in Tucson, Arizona, 85735

$139,500.00
2025 Forest River RiverStone 421FK - Used Fifth Wheel For Sale by Pop RVs in Tucson, Arizona features Slideout, Generator, Awning, Air Conditioning, Leveling Jacks
2025 RiverStone 421FK by Forest River from Pop RVs in Tucson, Arizona
Used 2025 Forest River RiverStone 421FK available in Tucson, Arizona

Unit Specs

  • Consignment
  • Reduced
  • Stock #505558
  • Year2025
  • ManufacturerForest River
  • Make Forest River
  • ModelRiverStone
  • Floorplan421FK
  • Type Fifth Wheel
  • ConditionUsed
  • Length42' 0"
  • Width8' 0"
  • Height13' 0"
  • Price $142,000.00
  • Sale Price $139,500.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Interior ColorWhite And Brown
  • Exterior ColorSilver W/graphics
  • Sleeps4
  • Water Capacity (Fresh)79 gal
  • Water Capacity (Grey)120 gal
  • Air Conditioners3
  • A/C Spec15,000 BTU
  • Slideouts6
  • Dry Weight18,805 lbs
  • # Axles3
Stock #505558 -

The 2025 Forest River Riverstone 421FK is a luxurious fifth-wheel trailer designed for comfort and style. It features a spacious interior and high-end

Step inside this beautifully appointed RV and enjoy the comfort and convenience of a residential-style interior designed for extended stays and relaxing getaways. The well-equipped kitchen features an upgraded Calcutta solid-surface countertop, large stainless-steel kitchen sinks with a residential-style faucet, an 18 cu. ft. French-door refrigerator with ice maker, a 3.7 cu. ft. oven with a four-burner range, and a 30-inch stainless-steel microwave with convection. Solid-surface sink covers and a matching solid-surface backsplash add both style and functionality.

The main living area features durable vinyl flooring, with matching vinyl flooring in the slide-outs, LED lighting throughout, day/night roller shades, and a 5,200 BTU fireplace that creates a warm and inviting atmosphere. The spacious living room includes sofa/desk slides and plenty of overhead storage cabinets for keeping your belongings organized. Hardwood dovetail drawers, residential soft-close cabinet hinges, and soft-close drawer glides provide the quality and convenience you expect from a residential-inspired interior.

The private sleeping area includes a 10-inch memory foam mattress measuring 72" x 80", with under-bed storage for clothing, bedding, and personal belongings. The bathroom features an oval porcelain toilet with bidet and convenient foot-flush operation.

Additional comfort and convenience features include a powerful 40,000 BTU furnace, cordless vacuum, and thoughtful storage throughout. From the upgraded kitchen finishes to the residential-style cabinetry and comfortable living space, this RV combines functionality, quality, and home-like comfort--making it an excellent choice for weekend adventures, extended travel, or full-time RV living.

Built for comfort, durability, and dependable performance, this RV features a premium construction package designed for extended travel and all-season use. Batten insulation throughout the sidewalls, slide-outs, ceiling, and floors helps provide excellent temperature control, while the -inch plywood roof decking and impact-guard roof add strength and protection.

The exterior features 3-inch hung-glass walls with a high-gloss gel coat finish, along with painted fiberglass front and rear caps for a sleek, durable appearance. Dual-pane square frameless windows provide an attractive look while helping improve insulation and comfort.

The RV rides on 17.5-inch H-rated tires with aluminum rims, supported by a CURT TCS suspension system and tandem 8,000-lb. axles or 7,000-lb. tri-axles, depending on the model. Hydraulic slide-outs on the main level and bed slides provide generous living space, while composite slide-out floors add durability. An electric awning with integrated LED lighting extends the usable outdoor living area, and side turning lights, high-visibility chrome LED tail lights, and a 32" x 78" entry door with friction hinges provide added convenience and visibility.

For outdoor convenience, the RV includes a 12V heated full docking station, electric dump valves, a water manifold system, dual 40-lb. LP tanks, and a 12V-powered 50-amp cord reel. The MORryde entry step and Safe-T-Rail make entering and exiting easier and more secure. Two dual 6V or 12V slide-out battery trays provide flexible battery storage, while the 2-inch hitch receiver offers a convenient option for carrying a bike rack with a 300-lb. rating (not available on toy hauler models).

Two 15,000 BTU high-performance Quiet Cool air conditioners and one heat pump handle climate control, providing powerful heating and cooling. Additional exterior details include riveted skirt metal, entry door silk screening, and a durable overall construction package engineered for comfort and long-term use.

With its heavy-duty running gear, insulated construction, premium exterior materials, and thoughtful campground conveniences, this RV is ready for everything from weekend adventures to extended road trips.

Would make a great Park Model.

This listing has now been on the market 30 days. If you are thinking of making an offer, go ahead and submit it today! Let's make a deal!

Reason for selling is no longer using.

You have questions? We have answers. Call us at (941) 200-1030 to discuss this RV.

Selling your RV has never been easier. At Pop RVs, we literally sell thousands of units every year all over the country. Call (855) 273-7188 and we'll get started selling your RV today.

2025 Forest River RiverStone 421FK Features


  • Electrical
    Air Conditioning, Generator
  • Exterior
    Awning, Leveling Jacks, Slideout

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

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 the base unit. Certain options may change specifications listed. Please consult dealer for more details. RVUSA.com cannot guarantee the accuracy of the data presented.
Stock #: 505558
Seller Info

Pop RVs

8121 Vicela Drive
Sarasota, FL 34240

Member Since 2015

See 815 Reviews

Unit Specs

  • Consignment
  • Reduced
  • Stock #505558
  • Year2025
  • ManufacturerForest River
  • Make Forest River
  • ModelRiverStone
  • Floorplan421FK
  • Type Fifth Wheel
  • ConditionUsed
  • Length42' 0"
  • Width8' 0"
  • Height13' 0"
  • Price $142,000.00
  • Sale Price $139,500.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Interior ColorWhite And Brown
  • Exterior ColorSilver W/graphics
  • Sleeps4
  • Water Capacity (Fresh)79 gal
  • Water Capacity (Grey)120 gal
  • Air Conditioners3
  • A/C Spec15,000 BTU
  • Slideouts6
  • Dry Weight18,805 lbs
  • # Axles3

Unit Location

  • City Tucson
  • State Arizona
  • Zip 85735

Email Seller

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Pop RVs
Pop RVs

8121 Vicela Drive
Sarasota, FL 34240

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Used 2025 Forest River RiverStone 421FK available in Tucson, Arizona
2025 Forest River RiverStone 421FK - Used Fifth Wheel For Sale by Pop RVs in Tucson, Arizona features Slideout, Generator, Awning, Air Conditioning, Leveling Jacks
2025 RiverStone 421FK by Forest River from Pop RVs in Tucson, Arizona
Used 2025 Forest River RiverStone 421FK available in Tucson, Arizona