- SALE PRICE: $119,977
- MSRP: $207,534
- You Save: $87,557
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45ft long
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18,331 lbs
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Sleeps 4
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5 slides
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Front KitchenKitchen Island
421FK Floorplan
Specifications
| Sleeps | 4 | Slides | 5 |
| Length | 45 ft | Ext Width | 8 ft 6 in |
| Ext Height | 13 ft 4 in | Hitch Weight | 3270 lbs |
| GVWR | 24000 lbs | Dry Weight | 18331 lbs |
| Cargo Capacity | 5669 lbs | Fresh Water Capacity | 79 gals |
| Grey Water Capacity | 120 gals | Black Water Capacity | 40 gals |
| Tire Size | 17.5" | Furnace BTU | 40000 btu |
| Available Beds | King | Refrigerator Type | French Door with Ice Maker |
| Refrigerator Size | 18 cu ft | Cooktop Burners | 3 |
| Number of Awnings | 2 | Axle Weight | 8000 lbs |
| LP Tank Capacity | 40 lbs | Water Heater Type | Truma Aqua Go Comfort On Demand |
| AC BTU | 30000 btu | TV Info | LR 65" Samsung LED Smart TV, BR 40" LED TV |
| Awning Info | 16' Electric with LED Lights | Axle Count | 2 |
| Washer/Dryer Available | Yes | Number of LP Tanks | 2 |
| Shower Type | Standard | Electrical Service | 50 amp |
| VIN | 4X4FRS835S0005024 |
Description
Forest River RiverStone fifth wheel 421FK highlights:
- Kitchen Island
- Front Kitchen
- Theater Seats
- Dual Vanity Sink
- Stackable Washer and Dryer
The New 2025 Forest River RV RiverStone 421FK is a luxury fifth wheel built for travelers who want premium comfort, smart design, and uncompromising quality on every journey. With an expansive floorplan, high-end finishes, and thoughtful amenities throughout, this RiverStone model delivers a resort-style travel experience that feels like home — whether you’re parked at your favorite campground or exploring new destinations across the country.
Designed for families, couples, and long-haul adventurers who refuse to compromise on space or comfort, the 421FK offers a perfect blend of functionality and style. From its generous living areas to its upscale kitchen and master suite retreat, this fifth wheel makes every trip a memorable adventure.
Why the Forest River RV RiverStone 421FK Stands Out
The RiverStone 421FK stands out with one of the most spacious and versatile floorplans in its class. Step inside to discover a light-filled interior with large windows, thoughtfully arranged living spaces, and residential-style touches that make life on the road feel effortless. The generous front kitchen layout offers abundant counter space, premium appliances, and smart storage, giving you the tools you need to prepare meals with ease.
The living area features comfortable seating, entertainment space, and room for guests or family gatherings, making it ideal whether you’re hosting friends or unwinding after a day of exploring. The master suite offers a private retreat with a comfortable bed, ample wardrobe storage, and carefully designed finishes that elevate your nightly rest.
The RiverStone 421FK also includes practical amenities like ample storage throughout, reliable climate control, and high-quality construction that will stand up to years of travel. Every detail is crafted with thoughtful intention, from durable flooring to elegant cabinetry, ensuring this trailer not only looks great but performs beautifully for years to come.
Reasons to Buy the 2025 Forest River RV RiverStone 421FK
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Expansive, thoughtfully designed floorplan with generous living space
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Premium kitchen with high-end appliances and abundant counter space
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Comfortable master suite with stylish finishes and ample storage
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Large panoramic windows for natural light and scenic views
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Multiple living zones ideal for entertaining or relaxing
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Durable construction and smart storage solutions throughout
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Designed for extended travel, seasonal use, or full-time living
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Strong resale value and long-term ownership confidence
Features
Standard Features (2025)
Standard Interior Package
- 3.7 CF oven with 4 burner range
- Upgraded Calcutta Solid Surface Countertop in kitchen
- Large Stainless Steel Kitchen Sinks with Residential Faucet
- 18 CU. FT. French Door Refrigerator with Ice Maker
- Vinyl Flooring
- LED Lighting Throughout
- 30” Stainless Steel Microwave
- Oval Porcelain Toilet with Foot Flush
- Cordless Vacuum
- 40,000 BTU Furnace
- 10” Thick Memory Foam Mattress 72”x80” Standard --(Toy haulers 66”x80”)
- Vinyl Flooring in Slide outs
- Day/Night Roller Shades Throughout
- 5200 BTU Fireplace in Living Room
- Solid Surface Sink Covers
- Overhead Storage Cabinets in Main Level Living Room
- Sofa/Desk Slides
- Residential Soft Close Hinges on Cabinet Doors
- Soft Close Drawer Glides
- Hardwood Dovetail Glides
- Under-bed Storage Compartment
- Solid Surface Backsplash
Standard Exterior Package
- Batten Insulation in Side Walls, Slideouts, Ceiling, and Floors
- 3/8" Plywood Roof Decking
- Fiberglass Roof
- 17.5" H-Rated Cooper Tires with Aluminum Rims
- Hydraulic Slideouts on Main Level and Bed Slides
- Electric Awning with LED Lights
- Side Turning Lights
- LCI Road Armour Suspension System
- 3" Hung Glass Exterior Walls with High Gloss Gel Coat Exterior
- Tandem 8,000 lb. Axles / 7,000 lb. Tri-Axles
- 32" x 78" Entry Door with Friction Hinges
- Dual Pane Frameless Windows
- 12v Heated Full Docking Station
- Two 15,000 BTU High Performance Quiet Cool A/Cs with Heat Pumps
- 12V Powered 50 Amp Cord Reel
- Painted Full Front and Rear Fiberglass Caps (N/A 419RD, 42FSKG, 421FK, 425FO – front caps only)
- MORryde Entry Step at Main Door
- MORryde Safe-T-Rail
- Water Manifold System
- Composite Slideout Floors
- Two Dual 6V or 12V Slide-Out Battery Trays
- High Visibility Chrome LED Tail Lights
- 2" Hitch Receiver for Bike Rack (300 lb. rating) (N/A in Toy Hauler Models)
- Dual 40 lb. LP Tanks
RiverStone Luxury Package (Mandatory)
- Automatic 6-Point Hydraulic Level-Up System
- Four Camera Observation System Prep
- TravlFi Journey XTR 4G/LTE Router & WiFi Extender
- Splendide “Astral” Stackable Washer and Dryer
- Stained or Painted Hardwood Cabinetry and Stiles Throughout
- 40" LED TV in Bedroom
- 12V Heated Holding Tanks
- Fisher & Paykel Dishwasher
- Ceiling Fan (N/A on 425FO)
- Truma Aqua Go Comfort On-Demand Hot Water Heater
- LP Generator Prep
- BMPro Energy Management System
- Tank Sensors Display (Grey, Black and Fresh) Integrated with BMPro Readout
- Tire Pressure Sensors
- Additional Campside Awning with Weathershield
- Two Folding Chairs (N/A 421FK, 42FSKG)
Garage Model Standards
- Triple 7,000 lb. Axles
- 30 Gallon Fuel Station (4514BATH, 4513DST)
- Yamaha NPS 5500 Gas Generator with 30 Gallon Fuel Tank (4514BATH, 4513DST)
- Polk Audio Stereo System in Garage (4514BATH, 4513DST)
- 66" x 80" Residential 10" Memory Foam Mattress
- MORryde Zero Gravity Ramp Door
- 110" Deep, 64" Wide, 82" Tall (Bed up position) 58" Tall (Bed down position) Cargo Area (42FSKG)
- 162" Deep, 95" Wide; Door 84" Wide, 86" Tall Cargo Area (4514BATH)
- 152" Deep, 95" Wide; Door 84" Wide, 86" Tall Cargo Area (4513DST)
Ultimate Electronics Package (Mandatory)
- 65" Samsung LED Smart TV in Living Room (39RKFB, 421FK, 42FSKG)
- 50-55" Samsung LED Smart TV in Living Room (442MC, 419RD, 425FO, 4513DST, 4514BATH)
- Klipsch Premium Sound Bar
- 2,000W Inverter
- BMPro Touch Control System
- 200W Solar Panel with 30Amp MPPT Controller
- Pre-Wire Prep for Two Additional Solar Panels
Optional Legacy Package
- Full Body Paint
- Hydraulic Disc Brakes
- 3rd High Performance AC w/ Heat Pump
- 400W Additional Solar 100AH Lithium Battery
- LCI Waste Management System
Additional Options
- 3rd A/C (15,000BTU) with Heat Pump
- 5.5 Onan Marquis Gold LP Generator
- Cadet Wall Mounted Electric Heater in Bedroom
- Trail Air 21K Hitch (39RKFB)
- Furrion Four Camera System with 7" Monitor Screen—Rear, Side and Entry Door Views
- Slide Room Awning Toppers with Metal Weather Shields
- Two Additional 200W Solar Panels
- MORryde Independent Suspension System
- Full Body Paint
- Hydraulic Disc Brakes
- 40" Outside TV (N/A 42FSKG, 45BATH)
- 50" Outside TV (42FSKG)
- Queen Bed Suite IPO King Bed Suite
- 2nd Sofa IPO Desk (39RKFB, 42FSKG, 421FK)
- Ceramic Coating
- Ultimate Solar Package (1,000W, 460AH Lithium Battery)
See us for a complete list of features and available options!
All standard features and specifications are subject to change.
All warranty info is typically reserved for new units and is subject to specific terms and conditions. See us for more details.
Due to the current environment, our features and options are subject to change due to material availability.
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*All calculated monthly payments are an estimate for qualified buyers only and do not constitute a commitment that financing or a specific interest rate or term is available. Financing terms may not be available in all Campers Inn locations. Campers Inn RV Sales is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual inventory in stock on our lot. Please contact us for availability as our inventory changes rapidly.
Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.
Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.



