New and used 399M Momentum M-Class by Grand Design RVs for sale

New 2026 Grand Design Momentum M-Class 399M

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MESA, AZ
Mesa, AZ

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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! *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 Company locations. Campers Inn RV Sales is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes freight, 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.

New 2026 Grand Design Momentum M-Class 399M

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LITTLE DEALER OF MESA, AZ
Mesa, AZ

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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! *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 Company locations. Campers Inn RV Sales is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes freight, 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.

New 2026 Grand Design Momentum M-Class 399M

$164,995.00
TROY OH
Troy, OH

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Grand Design Momentum fifth wheel toy hauler 399M highlights: 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.

New 2026 Grand Design Momentum M-Class 399M

$154,995.00
CAMPERS INN RV MYRTLE BEACH, SC
Myrtle Beach, SC

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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.

New and used 399M Momentum M-Class by Grand Design RVs for sale

New 2026 Grand Design Momentum M-Class 399M

Call for price

New 2026 Grand Design Momentum M-Class 399M

Call for price

New 2026 Grand Design Momentum M-Class 399M

$164,995.00

New 2026 Grand Design Momentum M-Class 399M

$154,995.00

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