New 2024 Grand Design Momentum 399TH

Location Sanger, TX


Stock # 11468
MSRP $173,094.00
Sale Price $144,999.00






12 Years



Give Me My Best Price

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The 2024 Grand Design Momentum 399TH is an exceptional and spacious fifth-wheel toy hauler designed for adventurers who demand the perfect fusion of luxury and functionality. Measuring approximately 44 feet in length, this model is the epitome of versatility, providing ample space to bring your favorite recreational vehicles along for the journey. The exterior design is both rugged and visually striking, built to withstand the challenges of off-road travel while making a bold statement.

Inside the Momentum 399TH, you'll find a beautifully appointed living area that prioritizes both comfort and style. The main living space includes multiple slide-outs, creating an expansive and inviting environment. The living room features luxurious seating, an electric fireplace, and a large LED TV, creating a cozy and entertainment-centric space. The well-equipped kitchen is a chef's delight, boasting high-end appliances, solid surface countertops, and a residential refrigerator, ensuring you can prepare gourmet meals even in remote locations. The master bedroom offers a serene retreat, complete with a comfortable king-size bed, extensive storage options, and a washer and dryer prep area for added convenience during extended journeys.

The 2024 Grand Design Momentum 399TH offers a superb outdoor experience as well, with an electric awning and LED lighting for outdoor leisure. The spacious garage area features a heavy-duty ramp door and offers ample room for storing and accessing your recreational vehicles or equipment. This model is also equipped with advanced safety features, automatic leveling, a comprehensive climate control system, and state-of-the-art entertainment technology. In summary, the Momentum 399TH is the ultimate choice for those who desire an adventure-packed, luxurious toy hauler that can withstand the rigors of the great outdoors while providing all the comforts of home.



Lot Status:

On lot

Interior Color:

Silver Maple

Exterior Color:


Sleep Capacity:


Water Capacity - Black:

104 gal

Water Capacity - Fresh:

152 gal

Water Capacity - Grey:

104 gal

Refrigerator Capacity:



20,000 lb


15,900 lb

Dry Weight:

15,900 lb

Payload Capacity:

4,100 lb

Hitch Weight:

3,400 lb

# of Slideouts:


# of Axles:


Stock #:





Sanger, TX







Floorplan Type:

Bath and a Half
Front Bedroom
Kitchen Island
Mid Kitchen
Patio Deck
Rear Bath
Two Entry/Exit Doors

Secondary Type:

Fifth Wheel


43' 0"


8' 0"


13' 0"

  • Appliances
  • Icemaker
  • Microwave
  • Oven
  • Refrigerator
  • Stove Cover
  • Stove Top Burner
  • Water Heater
  • Electrical
  • Air Conditioning
  • Batteries
  • Generator
  • Solar Prep
  • Equipment
  • Bluetooth Stereo
  • CO Detector
  • Fire Extinguisher
  • LED Lights
  • LP Detector
  • Propane
  • Smart TV
  • Smoke Detector
  • Stereo System
  • Surround Sound System
  • TV
  • Exterior
  • Alloy Wheels
  • Automatic Leveling Jacks
  • Awning
  • Detachable Power Cord
  • Hitch
  • Ladder
  • Leveling Jacks
  • Pass Thru Storage
  • Power Awning
  • Screen Door
  • Skylight
  • Slideout
  • Interior/Furnishings
  • Bath & 1/2
  • Day/Night Shades
  • Free Standing Dinette w/Chairs
  • Kitchen Sink
  • Medicine Cabinet
  • Overhead Cabinetry
  • Pantry
  • Pet Friendly
  • Queen Bed
  • Queen Mattress
  • Roof Vents
  • Shower
  • Theater Seating
  • Toilet

Similar Units For Sale

Dealer Information

McClain's Longhorn RV

13037 I 35 E Sanger, TX 76266

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2024 Grand Design Momentum 399TH Gallery

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