- SALE PRICE: $119,977
- MSRP: $207,534
- You Save: $87,557
-
45ft long
-
18,331 lbs
-
Sleeps 4
-
5 slides
-
FireplaceFront Kitchen
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 | 4X4FRS831S0004985 |
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 top-tier fifth wheel built for adventurers who demand premium comfort, stylish design, and unmatched livability. Designed with thoughtful floorplan flow and upscale finishes throughout, this model offers a spacious home-on-wheels experience that’s perfect for extended travel, seasonal stays, or full-time RV living. From the impressive kitchen to the luxurious bedroom retreat, every detail of the RiverStone 421FK is crafted to elevate your journey.
Inside, panoramic windows fill the interior with natural light and frame scenic views at every stop. The open living area blends comfort and function with plush seating, elegant cabinetry, and plenty of room to relax or entertain. The well-appointed kitchen boasts high-end appliances, generous countertop space, and storage solutions that make cooking on the road a pleasure. The master suite is a true retreat, offering a comfortable sleeping area, ample storage, and thoughtful touches designed to make every night restful. With premium materials, smart layouts, and quality craftsmanship throughout, the RiverStone 421FK delivers a refined RV experience that feels like home.
Reasons to Buy the 2025 Forest River RV RiverStone 421FK
-
Spacious and functional floorplan ideal for comfort, daily living, and hosting guests
-
Residential-style interior with high-end finishes and thoughtful design details
-
Chef-ready kitchen with quality appliances, abundant counter space, and smart storage
-
Private master suite with restful sleeping area and generous storage
-
Large panoramic windows for exceptional natural light and scenic viewing
-
Flexible living and dining areas designed for everyday use and entertaining
-
Durable construction and reliable RV systems built for long-term travel
-
Perfect for extended RV trips, seasonal camping, or full-time living
-
Strong resale value and confidence in Forest River quality
The RiverStone 421FK is built for RVers who want comfort, style, and livability without compromise, making it a standout choice among luxury fifth wheels.
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.
Save your favorite RVs as you browse. Begin with this one!
Loading
*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.



