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New 2025 Forest River RV RiverStone 421FK

Fifth Wheel

Stock #45615N133R

Belleville, MI

1 of 20

+20

Payments From: $34 /mo.

Salesperson

Mike Moynihan

Email Mike Moynihan

313-899-5424

Sleeps 4
5 Slides
Front Kitchen

Kitchen Island

45ft Long
18,331 lbs

See All Specs

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

Description

Forest River RiverStone fifth wheel 421FK highlights:

Kitchen Island
Front Kitchen
Theater Seats
Dual Vanity Sink
Stackable Washer and Dryer

You will feel right at home in this fifth wheel! The rear private bedroom has a 72" x 80" king bed slide for a good night's rest, a rear large wardrobe with the washer and dryer next to it, and even a dresser with a 40" LED TV. And two can get ready at once in the full bathroom with the dual sink vanity. You can then head to either the desk slide to get some work done or whip up some scrambled eggs on the three burner cooktop at the island in the front kitchen. The kitchen even has a dishwasher for easy clean up and two bar stools at the high top dinette that overlooks the middle living area. Relax each night in true comfort on either the E-Z Glide sofa bed slide or the theater seating across from the entertainment center which has a fireplace and 65" Samsung LED Smart TV to watch your favorite movies!

The Forest River RiverStone fifth wheels and toy haulers are luxurious units that have it all! You'll find an automatic six-point hydraulic level-up system to keep your unit in place, and there is preparation for a four-camera observation system. The TravlFi Journey XTR 4G/LTE router and WiFi extender will help you stay connected to the outside world, and you'll never have to overpack again since the Splendid “Astral” stackable washer and dryer will let you clean the small amount of clothes you've brought with you. Another high luxury is the Fischer Paykal dishwasher which will allow you to spend more time enjoying your camp life and less time cleaning up. Each unit is built with a LCI Road Armour suspension system, dual-pane frameless windows, a full docking station, a 200W solar panel, and a BMPro touch control system.

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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I have high regard for the service staff. The suggestions they have made to improve the functioning of my motorhome have been priceless.

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Cindy in the service department is a peach! She returned my call promptly and answered questions expertly with great advice! She’s a keeper & deserves a raise. ??

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I couldn’t say enough good about my experience if I tried. Anthony Bird was absolutely spot on with all of my questions and concerns during the entire process, providing updates all along the way as my fifth wheel was being built. When I arrived for pick up the entire staff helped solidify the pleasant ... More »

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734-545-8205
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National RV Detroit is not responsible for any misprints, typos, or errors found in our website pages. All prices and payments listed exclude sales tax, title, license, administrative processing, dealer prep and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual units on our lot. Please contact us @734-545-8205 for availability as our inventory changes rapidly. All calculated payments are an estimate only, do not constitute an offer of credit, and are subject to lender approval. Advertised monthly payment is based on 20% cash down, plus tax, title and registration, at 8.99% APR for 144 months on amounts under $25,000, at 8.99% APR for 180 months on amounts from $25k to $50,000, at 8.49% for 240 months on amounts from $50k to $150,000, and at 7.99% APR on amounts over $150k. Actual loan terms will vary depending on your specific credit situation. Advertised sale price is applicable only with indirect finance contract arranged by dealership.

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New 2025 Forest River RV RiverStone 421FK

421FK Floorplan

Specifications

Description

Features