- Front Private Bedroom
- Kitchen Island
- Hybrid Desk/Dinette
- Unobstructed Pass-Thru Storage
- Side Patio
Unleash the Road Warrior in You: The New 2026 Grand Design Momentum M-Class 399M at Campers Inn RV
Experience the ultimate in luxury, power, and adventure with the new 2026 Grand Design Momentum M-Class 399M, a toy hauler designed for thrill-seekers, families, and adventurers who refuse to compromise on comfort. With its spacious living area, advanced features, and rugged capabilities, the 399M allows you to bring your toys, gear, and lifestyle wherever the road—and your adventures—take you.
Spacious Living Meets Adventure-Ready Design
Step inside the 399M and discover a masterfully designed interior that seamlessly blends style and functionality. The garage area provides versatile space for ATVs, motorcycles, or bikes, while converting into additional sleeping or lounge space with ease. The main living area boasts dual slide-outs, a residential sofa, theater seating, and a large LED TV, creating a comfortable environment for relaxing, entertaining, or unwinding after a long day.
The fully equipped kitchen features solid-surface countertops, a stainless-steel sink, residential refrigerator, three-burner cooktop with oven, and microwave, making it easy to prepare meals anywhere. Ample cabinet space, pantry storage, and modern finishes complete the home-like feel of this luxurious toy hauler. The master bedroom includes a king-size bed, wardrobe storage, and a private entertainment setup, while the bathroom offers a spacious shower, toilet, and sink with sleek, contemporary fixtures.
Power, Durability, and Off-Grid Capabilities
Built for adventure, the Momentum M-Class 399M features a robust frame, reinforced suspension, and heavy-duty tires, ensuring it can handle the rigors of towing your favorite toys and traveling off the beaten path. With automatic leveling jacks, high-capacity fuel tanks, and smart storage solutions, setup and travel are effortless, leaving you free to focus on your adventure.
The garage area also comes equipped with a power ramp door, tie-downs, and durable flooring, so you can safely transport and store your recreational gear without worry. With modern insulation and climate control systems, the 399M provides comfort in any season, making it perfect for year-round excursions.
Why Buy the 2026 Grand Design Momentum M-Class 399M?
Adventure-Ready Layout: Toy hauler garage plus convertible living space offers unmatched versatility.
Luxury Amenities: Residential kitchen, theater seating, king bed, and high-end finishes throughout.
Built to Last: Heavy-duty frame, reinforced suspension, and durable construction for every adventure.
Convenience and Technology: Automatic leveling, storage solutions, and modern features simplify travel.
Perfect for Families and Thrill-Seekers: Ideal for weekend warriors, full-time RVers, or extended road trips.
Why Buy from Campers Inn RV?
When you purchase from Campers Inn RV, you’re choosing America’s RVer’s Trusted Resource since 1966. Our knowledgeable team is committed to helping you find the perfect RV and providing exceptional service and support every step of the way.
We offer competitive pricing, flexible financing options, and nationwide service support to ensure your Momentum M-Class 399M stays adventure-ready for years to come. Our certified technicians and expert sales staff make RV ownership simple, seamless, and enjoyable, from the moment you choose your unit to every mile of your journey.
At Campers Inn RV, we don’t just sell RVs — we deliver experiences, memories, and peace of mind. Whether you’re a seasoned traveler or a first-time buyer, we provide the guidance and support you need to maximize every adventure.
Take your adventures to the next level with the 2026 Grand Design Momentum M-Class 399M — available now at Campers Inn RV. Visit your nearest location or browse online to see why more RVers trust Campers Inn RV for quality, value, and unforgettable journeys.