2026 Grand Design Momentum 399M

New Toy Hauler in Lexington, South Carolina, 29072

$194,199.00
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New 2026 Grand Design Momentum 399M available in Lexington, South Carolina
2026 Grand Design Momentum 399M - New Toy Hauler For Sale by Blue Compass RV Columbia in Lexington, South Carolina features Slideout
2026 Momentum 399M by Grand Design from Blue Compass RV Columbia in Lexington, South Carolina
New 2026 Grand Design Momentum 399M available in Lexington, South Carolina

Unit Specs

  • Stock #T133789
  • Year2026
  • ManufacturerGrand Design RV
  • Make Grand Design
  • ModelMomentum
  • Floorplan399M
  • Floorplan LayoutFront Bedroom
    Kitchen Island
    Two Entry/Exit Doors
  • Type Toy Hauler
  • ConditionNew
  • Length44' 0"
  • VIN573FM4732TBB04984
  • Price $194,199.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Sleeps4
  • Water Capacity (Fresh)140 gal
  • Water Capacity (Black)52 gal
  • Water Capacity (Grey)104 gal
  • Slideouts3
  • Tow/Hitch Weight3406 lbs
Grand Design Momentum fifth wheel toy hauler 399M highlights:
  • Front Private Bedroom
  • Kitchen Island
  • Hybrid Desk/Dinette
  • Unobstructed Pass-Thru Storage
  • Side Patio

 

This toy hauler has all the comfort and convenience you could ask for! Once you have unloaded your toys from the 12' 6" separate garage, you can start lunch on the exterior griddle located by the side patio. There is also a 65" TV here and a 1.7 cu. ft. refrigerator to entertain guests! And if you have guests staying over, you can choose to add the optional Liftsuite system with underside can lights in the garage. If the weather isn't cooperating, you can make meals in the fully equipped interior kitchen, complete with an island, pantry, pull-out countertop extension and more. An L-shaped sofa with recliners is in perfect view of the 50" TV and fireplace, and there is even a hybrid desk/dinette with windows where you can get some work done if needed. Head towards the front to freshen up in the full bath before heading to bed in the private bedroom. Here, you'll find a queen bed slide out with an optional king bed, a large closet with washer and dryer prep, plus a dresser with TV prep if you want the option to watch movies in bed!

 

The Momentum fifth wheel toy haulers by Grand Design are built for four seasons of travel with your off-road toys and include luxurious accommodations throughout for extreme living! Each is constructed to a superior standard with the fully enclosed and heated underbelly and storage area, the 5-sided aluminum cage, and the triple insulated garage floor. The MORryde CRE3000 suspension system and rubber pin box, plus the upgraded axle hangers provide the performance and smooth towing you desire, while the interior offers luxury such as color changing LED accent lighting, hardwood cabinet doors with hidden hinges, and a central vacuum system. Each toy hauler also includes four packages, including the Garage Package with Tuff-Ply gas and oil-resistant flooring, the Weather-Tek Package with a Stealth AC System, and the Interior Luxury Package with solid surface countertops!

 

 

  • Front Bedroom
  • Kitchen Island
  • Two Entry/Exit Doors

2026 Grand Design Momentum 399M Features


  • Exterior
    Slideout

2026 Grand Design Momentum 399M Literature


Seller Info

Blue Compass RV Columbia

165 Business Park Rd
Lexington, SC 29072

Member Since 2021

See 1169 Reviews

Unit Specs

  • Stock #T133789
  • Year2026
  • ManufacturerGrand Design RV
  • Make Grand Design
  • ModelMomentum
  • Floorplan399M
  • Floorplan LayoutFront Bedroom
    Kitchen Island
    Two Entry/Exit Doors
  • Type Toy Hauler
  • ConditionNew
  • Length44' 0"
  • VIN573FM4732TBB04984
  • Price $194,199.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Sleeps4
  • Water Capacity (Fresh)140 gal
  • Water Capacity (Black)52 gal
  • Water Capacity (Grey)104 gal
  • Slideouts3
  • Tow/Hitch Weight3406 lbs

Email Seller

Request More Info on this 2026 Grand Design Momentum 399M Offered for sale by Blue Compass RV Columbia
Blue Compass RV Columbia
Blue Compass RV Columbia

165 Business Park Rd
Lexington, SC 29072

Phone: Click to Call

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New 2026 Grand Design Momentum 399M available in Lexington, South Carolina
2026 Grand Design Momentum 399M - New Toy Hauler For Sale by Blue Compass RV Columbia in Lexington, South Carolina features Slideout
2026 Momentum 399M by Grand Design from Blue Compass RV Columbia in Lexington, South Carolina
New 2026 Grand Design Momentum 399M available in Lexington, South Carolina