+6399TH Floorplan
Specifications
| Sleeps | 7 | Slides | 3 |
| Length | 43 ft 4 in | Ext Height | 13 ft 5 in |
| Hitch Weight | 3400 lbs | GVWR | 20000 lbs |
| Dry Weight | 15900 lbs | Fresh Water Capacity | 157 gals |
| Grey Water Capacity | 104 gals | Black Water Capacity | 104 gals |
| Tire Size | 16" | Furnace BTU | 40000 btu |
| Fuel Capacity | 60 gals | Number Of Bunks | 1 |
| Available Beds | Queen | Refrigerator Size | 18 cu ft |
| Convection Cooking | Yes | Cooktop Burners | 3 |
| Number of Awnings | 2 | Axle Weight | 7000 lbs |
| Garage Size | 13 ft | LP Tank Capacity | 30 lbs |
| Water Heater Capacity | 12 gal | Water Heater Type | Gas/Electric |
| AC BTU | 30000 btu | TV Info | LR 49" LED, BR 32" LED, Garage 32" LED, Ext. LED |
| Awning Info | 14' & 16' Power | Axle Count | 3 |
| Washer/Dryer Available | Yes | Number of LP Tanks | 2 |
| Shower Type | Shower w/Seat | Electrical Service | 50 amp |
| VIN | 573FM4530K1113087 |
Description
Adventure Awaits with the Grand Design Momentum 399TH Toy Hauler
Key Highlights:
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Dual Entry Doors
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Spacious Kitchen Island
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Exterior LED TV and Fold-Down Patio
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Dual Enclosed Fuel Station
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Convenient Spray Port
Get ready to take your off-road experiences to the next level with the Grand Design Momentum 399TH. Designed for thrill-seekers and outdoor enthusiasts, this fifth wheel toy hauler is packed with features that make every trip unforgettable. Load your dirt bikes, ATVs, or other gear into the expansive 13-foot garage, then hit the road knowing everything is safely secured with 2,500 lb. flush-mount tie-downs and durable, oil-and-gas-resistant Tuff-Ply flooring.
After a day on the trails, rinse off the dirt and dust in the half bath located in the garage or freshen up in the full bath just steps from the bedroom. Inside, the Momentum offers a welcoming space to relax and recharge. The kitchen island is perfect for meals or snacks, while the dinette and theater seating provide a front-row view of the 49" LED TV and cozy fireplace.
Step outside and turn your campsite into the ultimate hangout with a fold-down side patio featuring an exterior LED TV. The dual fuel stations keep your machines ready for action, and the dual entry doors and expansive pass-through storage make loading and unloading a breeze.
Engineered for year-round adventure, the Momentum includes Weather-Tek insulation and a fully enclosed fuel pump station, giving you four-season protection no matter where you roam. The triple-insulated garage ensures your gear stays protected in all conditions.
Additional premium features include:
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Central vacuum system with integrated tools
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Convection microwave for fast, convenient cooking
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Sofa with headrest and removable swivel table
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Satellite and solar roof access channel
Whether you're heading deep into the mountains or relaxing at your favorite lakefront spot, the Grand Design Momentum 399TH delivers rugged performance, modern luxury, and the freedom to chase adventure without limits.
Features
Standard Features (2019)
Standard Build Packages
Exterior Package - Mandatory
- Satellite TV Prep (All TV Locations)
- Aluminum Quad Entry Steps - Garage Entry (N/A 376TH)
- 7,000 lb. Axles w/Self Adjusting Brakes, Wet Bolts and Bronze Bushings
- 16” Aluminum Wheels (120PSI Rated)
- West Lake® E-Rated Tires w/NitroFill™
- 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 328M and 376TH)
- Full Paint Gel Coat Fiberglass Front Cap (376TH, 397TH, 399TH only)
- Solid Step Quad Entry Step - Main Entry
Interior Package - Mandatory
- 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 376TH)
Garage Package - Mandatory
- 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 376TH)
- Tuff-Ply Gas and Oil Resistant Garage Flooring
- Fast Ramp Rear Ramp Door (N/A 376TH)
- Triple Insulated Garage Floor (N/A 376TH)
Weather-Tek Package - Mandatory
- R-Value Equivalent (R-40 Roof / R-45 Floor / R-11 Sidewalls / R-40 Garage Floor / R-24 Slideroom 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
Exterior
- Under Mount 16” Spare Tire
- 6-Point Hydraulic Leveling System
- Trailair® Roto-Flex™ Pin Box (Momentum only)
- Keyed Alike™ Ramp Door Latches
- 2nd Power Patio Awning w/ LED Lights
- 3rd Power Awning w/ LED Lights (Main Slide - 394M, 395M and 397TH) - Mandatory
- Front and Back Under Unit Blue LED Light Kit - Mandatory
- High-Gloss Gel Coat Exterior Sidewalls
- Full Paint Gel Coat Fiberglass Front Cap (Momentum only)
- Door Side Exterior Spray Port
Construction
- Drop Frame Chassis (12" over 10") (Momentum only)
- Trailair® Equa-flex® Suspension
Interior
- Interior Color Changing LED Accent Lighting
- Raised Panel Hardwood Cabinet Doors w/Hidden Hinges
- Sofa w/Headrest & Removable Swivel Tables (Includes Heat, Massage & LED Lighting Package)
- Wall Mounted "No-Pedestal" Table w/4 Chairs (Std 394M, 395M only, Momentum Only)
- Central Vacuum System w/ Tools and Dust Pan
Kitchen
- Convection Microwave (Momentum only)
- 18 Cu. Ft. Refrigerator
- 30" Stainless Steel Microwave w/ Ext. Vent (M-Class only)
- Residential Kitchen Faucet
- Window Behind Range (328M, 349M, 351M, 354M, 381M, 398M, 397TH, 399TH)
- Kitchen Barstools w/ Extended Countertops (349M, 351M, 381M, 398M, 397TH, 399TH only)
Bedroom
- Residential Style Headboard
- Under Bed Storage Area (N/A 376TH)
- Individually Switched Reading Lights Over Bed
- Bedside 110-Volt Outlets
- 60" X 80" Queen Memory Foam Mattress (Momentum only)
Bathroom
- One-Piece Fiberglass Shower w/Glass Door
- Skylight Above Shower
- Porcelain Toilet
- Medicine Cabinet w/Mirrored Door
Audio & Video
- No-Crank Digital TV Antenna w/Booster
- Satellite/Solar Roof Access Channel
- 32" Class LED TV in Bedroom (Momentum only)
- TV Prep in Garage (N/A 376TH)
- Exterior Entertainment Center w/LED TV & DVD (Momentum only- mandatory)
HVAC & Plumbing
- 12v High Power Fan (Kitchen) (Momentum - std.; M-Class - mandatory)
- 12v High Power Fan - Master Bath (Momentum only - std.)
- 12V Tank Heaters (All Tanks)
- 35k BTU High Capacity Furnace
- Fireplace w/ 5,000 BTU Electric Heater
- 15k BTU A/C - Middle/Main
- 2nd 15k BTU A/C - Bedroom (mandatory)
- 3rd 13.5k BTU A/C (Includes Energy Mgmt. System & 3-Zone Thermostat) (Momentum only - std.)
Garage
- Rear Cargo Loading & Backup LED Lights
Utilities
- OneControl™ 7" Touchscreen Control Panel w/App Controls and Redundant Slide Switches
- Generator Prep
Options
Exterior
- Dual Pane Window Upgrade
- Back-Up Camera (Camera Prep Standard)
- Slide-Out Awning Toppers
- Full Body Paint
Interior
- Super Sofa Upgrade - IPO Theatre Seats & Dinette (394M, 395M, 397TH, 399TH only)
- 2 Person Dinette and Sofa Recliners - IPO 4 Seat Sofa (N/A Momentum, 394M, 395M)
Kitchen
- Convection Microwave (M-Class option)
Bedroom
- King Bed Upgrade (NA 376TH)
Audio & Video
- Rockford Fosgate Speaker Package w/12" Sub and 300W Amp
- Exterior Entertainment Center w/LED TV & DVD (M-Class option)
HVAC & Plumbing
- 12v High Power Fan - Garage (N/A Momentum or with 3rd AC Option)
- 3rd 13.5k BTU A/C (Includes Energy Mgmt. System & 3-Zone Thermostat) (M-Class)
- Heat Pump A/C - Living Area (Momentum only)
Garage
- Quick Set Ramp Door Patio System w/ Steps and Power Awning Included (N/A 376TH)
- 3-Season Garage Wall (NA w/ Pull Down Garage Screen Wall) (N/A 376TH)
- Happi-Jac Electric Bunk System w/Folding Sofas (N/A 376TH)
Utilities
- Onan 5.5KW Gasoline Generator
See us for a complete list of features and available options!
All standard features and specifications are subject to change.
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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.



