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Theater seats
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Theater seats
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Dinette
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Half-bath in garage
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Washer/dryer hookup
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Garage controls
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Central vac system
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ONEtouch control panel
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A/C controls (Living room, garage, bedroom)
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Indoor/outdoor stereo
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LED fireplace
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Living room TV
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Bedroom TV
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Onan 5.5kw gas generator
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Docking station and auto-level
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Door side storage
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Rear entry door to garage
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Front entry door to living space
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Side patio
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Outdoor entertainment
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MORryde rubber pinbox
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+64 
- SALE PRICE: $109,998
- MSRP: $176,266
- You Save: $66,268
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Sleeps 3
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3 Slides
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Theater SeatingFireplace
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43ft Long
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15,900 lbs
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SILVER MAPLE
399TH Floorplan
Specifications
| Sleeps | 3 | Slides | 3 |
| Length | 43 ft 1 in | Ext Height | 13 ft 5 in |
| Interior Color | SILVER MAPLE | Hitch Weight | 3400 lbs |
| GVWR | 20000 lbs | Dry Weight | 15900 lbs |
| Cargo Capacity | 4100 lbs | Fresh Water Capacity | 155 gals |
| Grey Water Capacity | 104 gals | Black Water Capacity | 104 gals |
| Tire Size | 16" | Furnace BTU | 40000 btu |
| Fuel Capacity | 60 gals | Available Beds | Queen or King |
| Refrigerator Type | Four Door | Refrigerator Size | 18 cu ft |
| Cooktop Burners | 3 | Number of Awnings | 2 |
| Axle Weight | 7000 lbs | Garage Size | 13 ft |
| LP Tank Capacity | 60 lbs | Water Heater Capacity | 12 gal |
| Water Heater Type | Gas/Electric | AC BTU | 30000 btu |
| TV Info | LR 49" LED TV, BR 32" LED TV, Garage 32" LED TV, Ext. LED TV | Awning Info | 14' & 16' Power w/LED Lights |
| Axle Count | 3 | Washer/Dryer Available | Yes |
| Number of LP Tanks | 2 | Shower Type | Sunken Tub/Shower |
| Electrical Service | 50 amp | VIN | 573FM4530PBB01185 |
Description
Experience Ultimate Adventure with the New 2023 Grand Design Momentum 399TH at Campers Inn RV!
When luxury meets rugged capability, you get the 2023 Grand Design Momentum 399TH, a fifth-wheel toy hauler that redefines how you travel and play. With its exceptional design, high-end amenities, and versatile functionality, this RV is perfect for thrill-seekers who refuse to compromise on comfort.
Key Features of the Grand Design Momentum 399TH
- Spacious Garage: Boasting a 13-foot garage with a dovetail ramp, tie-downs, and convertible seating, it’s perfect for bringing along ATVs, motorcycles, or other adventure gear.
- Luxurious Living Area: The open-concept living space features reclining theater seating, an LED fireplace, and a 49” LED HDTV for ultimate relaxation after a day of fun.
- Gourmet Kitchen: Equipped with solid-surface countertops, a residential refrigerator, a convection microwave, and a three-burner stove, the kitchen feels just like home.
- Private Master Suite: Unwind in the king-size bed with ample storage, USB charging ports, and a wardrobe slide-out for added convenience.
- Spacious Bathrooms: Two full bathrooms with modern fixtures ensure that everyone has the privacy and comfort they need.
- Outdoor Entertainment: Includes an exterior TV, speakers, and an electric awning for hosting outdoor gatherings or relaxing in the shade.
- Off-Grid Capabilities: Equipped with solar prep, an Onan generator, and large holding tanks, this RV supports extended off-the-grid adventures.
- Exceptional Build Quality: Grand Design’s renowned craftsmanship ensures durability and performance, no matter the terrain.
Why the Grand Design Momentum 399TH is Perfect for You
- Unmatched Versatility: Combines luxurious living with ample storage for all your adventure gear.
- Innovative Design: Features like the garage-to-living space transition and elevated sleeping quarters maximize functionality.
- Year-Round Comfort: Stay cozy with an insulated underbelly and weather-resistant materials for all-season travel.
- Adventure-Ready: Ideal for adrenaline junkies who love bringing their toys along for the ride.
- Luxury Finishes: Offers the upscale amenities you’d expect from a high-end residential space.
Why Buy from Campers Inn RV?
- Experience You Can Trust: With over five decades of RV expertise, we guide you to the perfect model for your lifestyle.
- Top-Tier Selection: From the latest models to pre-owned gems, we carry a wide range of options to meet every need.
- Exceptional Customer Care: Our team is dedicated to ensuring your RV experience is smooth from start to finish.
- Comprehensive Services: From financing to maintenance, we’re your one-stop shop for all things RV.
- Community Focused: At Campers Inn RV, we value building relationships and making your RV dreams a reality.
Start Your Adventure Today
The New 2023 Grand Design Momentum 399TH is your ticket to luxury, adventure, and unforgettable memories. Whether you're hitting the trails or lounging in style, this RV delivers everything you need and more.
Visit Campers Inn RV today to explore the Momentum 399TH and let our team help you gear up for your next big adventure! Your journey begins here.
- Loaded with Interior, Exterior, Garage and Insulation Pkgs
- Under Unit LED Kit
- Bed A/C
- Upgraded Tires and Wheels
- Ext Entertainment Center
- 3rd A/C
- Aux Fresh Water Tank
- Solar Prep
- 20CF 12V Fridge
- King Bed Upgrade
- Super Sofa Upgrade
- Rockford Fosgate Upgrade
- 5.5KW Gen
- 3 Season Door with Sliding Windows
- Heat Pump A/C
- Haapi Jac Electric Bunk System
- Rear Aluminum Deck System w Power Awning
- Rear Patio Steps
- Patio Chairs
- Slide Out Toppers
- Solar Pkg
- 7k Axle with ABS Brakes (Triple Axle)
Features
Standard Features (2023)
Exterior
- Keyed Alike™ Ramp Door Latches
- 2nd Patio Awning w/ LED Lights
- 3rd Awning w/ LED Lights (Main Slide - 397THS & 410TH)
- Interior Color Changing LED Accent Lighting
- High-Gloss Gel Coat Exterior Sidewalls
- Door Side Exterior Spray Port
- Frameless Tinted Windows
- Walk-On Roof
- 17.5" Spare Tire (Undermount)
- Solid Step Quad Entry Step
- Slam-Latch Baggage Doors
- Mo-Secure
Construction
- 101" Wide Body Construction
- 5-Side Aluminum Cage Construction
- Fully Enclosed and Heated, Underbelly and Storage Area
Running Gear
- Upgraded Axle Hangers
- Heavy Duty H-Rated Tires w/NitroFill™
- Heavy Duty 7,000 lb. Axles with ABS Brakes
- 17.5" H-Rated Aluminum Wheels
- MORryde® CRE3000 Suspension System
- Anti-Lock Brake System
Frame & Chassis
- 6-Point Hydraulic Leveling System
- MORryde® Pin Box
- 101" Wide Body Super Chassis w/Drop-Frame Storage
Interior
- Interior Color Changing LED Accent Lighting
- Hardwood Cabinet Doors w/Hidden Hinges
- Sofa w/Headrest (Includes Heat, Massage & LED Lighting Package
- Central Vacuum System w/ Tools and Dust Pan
- Plywood Drawer Bottoms
Kitchen
- Microwave
- Residential Kitchen Faucet
- Professional Grade Stainless Steel Cooktop
- 12-Volt High Power MaxxAir w/Rain Sensor
- Window Behind Range
- Kitchen Barstools w/ Extended Countertops (397THS, 399TH, 410TH only)
Electrical
- Solar Prep (10 gauge wiring with universal MC4 connectors)
- 75 Amp Converter
- 12V Battery Disconnect
HVAC
- 12V High Power Fan (Kitchen)
- 35k BTU High Capacity Furnace
- Fireplace w/ 5,000 BTU Electric Heater
- StealthAC Smart AC System
- Attic Vent
- High Capacity Heat Ducts
Plumbing
- Exterior Spray Port (Door Side)
- 12V Tank Heaters
- Sewer Hose Storage Area
- Whole House Water Filtration System
- All-In-One Enclosed and Heated Utility Center
Bedroom
- Under Bed Storage Area (N/A 376THS)
- Individually Switched Reading Lights Over Bed
- Bedside 110-Volt & USB Outlets
- Window Above Master Bed Headboard
- 60" X 80" Queen Bed Pillow Top Bed Mattress
Bathroom
- Skylight Above Shower
- Porcelain Toilet
- Medicine Cabinet w/Mirrored Door (N/A 410TH)
- Undermount Lav Sink
- One-Piece Fiberglass Shower w/Glass Door & Teak Bench Seat
Appliance
- Fireplace with Electric Heater
- Stainless Steel 20 Cu. Ft. Refrigerator
- 30" Over-The-Range Microwave
Electronics
- OneControl™ System
- Back-Up Camera Prep
- Exterior Cable/SAT Plug-In
- LED Smart TV in Living Area
- LED TV in Bedroom
- Rockford Fosgate Stereo Entertainment System w/HDMI and App Controls
- Exterior Speakers
- No-Crank Digital TV Antenna w/Booster
- LED TV in Garage (N/A 376THS)
Packages
Exterior Package
- Satellite TV Prep (All TV Locations)
- Aluminum Quad Entry Steps - Garage Entry (N/A 376THS)
- 7,000 lb. Axles w/Self Adjusting Brakes, Wet Bolts and Bronze Bushings
- 17” Aluminum Wheels (120PSI Rated)
- Cooper Tires 17.5" All-Steel H-Rated Tires
- Slam-Latch Baggage Doors
- Frameless Tinted Windows
- Aluminum Quad Entry Steps - Main Entry
- Exterior Security Lights
- Power Patio Awning w/LED Lighting
- Folding Roof Ladder
- White Gel Coat Fiberglass Front Cap
- 12V Battery Disconnect
- All-In-One Exterior Utility Center
- 50 Amp Service
- Converter
- Enclosed Fuel Station w/ Dual Fuel Tank (Single Tank 376THS)
- Full Paint Gel Coat Fiberglass Front Cap (376THS, 397TH, 399TH only)
- Solid Step Quad Entry Step - Main Entry
Luxury Interior Package
- 49" Class LED TV in Living Area
- Stereo Entertainment System w/Bluetooth and App Based Controls in Living Area
- Washer/Dryer Prep
- 12 Gallon Gas/Electric Water Heater
- Roller Shade Window Coverings (Main Living Area and Bedroom)
- Recessed LED Puck Lighting
- Solid Surface Countertops w/ Sink Covers
- Stainless Steel Undermount Kitchen Sink
- Chef Inspired Range & Oven w/ Cover
- Kitchen Pantry w/ LED Light Strip
- Garage Control Panel (N/A 376THS)
Garage package
- 32" Class LED TV in Garage (397TH and 399TH only)
- Protective Diamond Plate on Garage Sidewalls
- 2,500 lb. Rated Flush-Mount Tie-Downs
- Ram-Air Garage Vents Both Sides (N/A 376THS)
- Tuff-Ply Gas and Oil Resistant Garage Flooring
- Fast Ramp Rear Ramp Door (N/A 376THS)
- Triple Insulated Garage Floor (N/A 376THS)
Weather-Tek Package
- R-Value Equivalent (R-40 Roof / R-45 Floor / R-11 Sidewalls / R-40 Garage Floor / R-24 Slide room Floor)
- Fully Enclosed and Heated, Underbelly and Storage Area
- Enclosed and Heated Low Point Drains
- Engineered Underbelly Airflow Heat Paths
- Stealth AC System w/ Insulated A/C Ducts
- Attic Vent
- Plumbing Line Insulation Barrier
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.