New 2026 Grand Design Momentum M-Class 399M Toy Hauler Fifth Wheel

Grand Design Momentum 399M – Luxury Toy Hauler with Three A/Cs

• Front Private Bedroom with King Bed
• Kitchen Island & Hybrid Desk/Dinette
• Side Patio with Exterior Griddle & 65" TV
• 12' 6" Garage with Unobstructed Pass-Through Storage
• Three A/C Units & 6k Watt Generator for Comfort & Power

Interior Features

• Spacious living area with L-shaped sofa and recliners
• Hybrid desk/dinette with windows for work or meals
• Kitchen island with pull-out countertop extension, pantry, and full appliances
• Full bath with shower, toilet, and sink
• Front private bedroom with king bed slide out, large closet with washer/dryer prep, and dresser with TV prep

Exterior Features

• Side patio with exterior griddle, 65" TV, and 1.7 cu. ft. refrigerator
• 12' 6" garage for off-road toys with optional Liftsuite system
• Unobstructed pass-through storage for gear

Packages & Additional Features

• Solar + Package: roof-mounted solar with enhanced battery system
• Comfort & Convenience: Three A/C units and 6k watt generator for extended off-grid living
• Safety & Assurance: 7k axles with ABS drum brakes, MORryde CRE3000 suspension, and rubber pin box for smooth towing
• Luxury & Design: Hardwood cabinet doors with hidden hinges, central vacuum system, and solid surface countertops

The Grand Design Momentum 399M combines residential comfort with extreme toy hauler capability. With three A/C units, a king bed, a fully equipped kitchen, and a 12' 6" garage, it’s perfect for both off-grid adventures and luxury living on the road.

Disclaimer: Contact us today to confirm availability, features, and options. Specifications are subject to change without notice.