NEW 2025 Grand Design Momentum M-Class 344M

The Grand Design RV Momentum M-Class 344M is an exceptional fifth wheel toy hauler that strikes the perfect balance between luxury and rugged functionality. Designed with the outdoor enthusiast in mind, this model offers an impressive combination of versatile storage space, premium interior amenities, and advanced technology, making it ideal for those who want to bring their recreational toys along without sacrificing comfort. The exterior of the Momentum M-Class 344M boasts a sleek and modern design with high-gloss gel coat sidewalls, frameless tinted windows, and LED lighting, all of which contribute to both its aesthetic appeal and durability. With a durable aluminum frame and vacuum-bonded construction, this RV is built to withstand the demands of outdoor adventures while maintaining its structural integrity. Additionally, the 344M comes equipped with a weather-tek insulation package, ensuring year-round comfort no matter where your travels take you.

One of the standout features of the Momentum M-Class 344M is its spacious garage, which offers an impressive 13-foot length to accommodate a variety of off-road vehicles, from ATVs to dirt bikes. The garage is equipped with tie-downs to secure your toys during transit, and the ramp door allows for easy loading and unloading. Once your vehicles are unloaded, the garage area transforms into a multi-functional space that can be used as a secondary living area or additional sleeping quarters. The Happi-Jac electric bunk system allows for a queen-size bed to be lowered from the ceiling, while the dual opposing sofas provide additional seating or can be converted into extra sleeping space. This versatility makes the garage area perfect for accommodating guests or creating a private retreat away from the main living area.

Inside, the Momentum M-Class 344M offers a luxurious living space that rivals some of the finest residential homes. The main living area features an open floor plan with a kitchen, dining, and lounging area all seamlessly integrated for optimal comfort and convenience. The kitchen is a chef's dream, with solid surface countertops, a large kitchen island, a residential refrigerator, a three-burner cooktop, and a microwave. The spacious pantry and ample cabinet storage ensure you have plenty of room for all your cooking essentials. The kitchen's design also includes modern appliances and a stylish backsplash, giving it a contemporary and sophisticated feel. Adjacent to the kitchen, the entertainment area includes theater seating with heat and massage functions, perfect for unwinding after a day of outdoor activities. The large flat-screen TV, sound system, and optional electric fireplace provide all the entertainment and ambiance you need for a relaxing evening indoors.

The master suite, located at the front of the RV, provides a peaceful sanctuary for rest and relaxation. The bedroom features a queen-size bed with an upgraded mattress, ensuring a good night's sleep. The wardrobe space is generous, with a large walk-in closet, additional overhead cabinets, and under-bed storage. The room also has convenient USB charging ports and a TV hookup for added entertainment. The en-suite bathroom is well-appointed with a porcelain foot-flush toilet, a spacious shower with a glass door, and a vanity with a sink and medicine cabinet. The residential feel of the bathroom, combined with the high-quality finishes, ensures that you never feel like you're roughing it, even when you're miles away from civilization.

The Momentum M-Class 344M also excels in terms of outdoor living and convenience. It comes equipped with a large power awning with LED lights, allowing you to create a comfortable outdoor living space for relaxing or entertaining. The exterior kitchen provides everything you need for outdoor cooking, while the external storage compartments offer additional space for your gear and supplies. The toy hauler also includes a fuel station with a large fuel tank, ensuring that you can refuel your recreational vehicles without having to leave the campsite.

In terms of technology and utilities, the 344M is equipped with all the modern conveniences you'd expect from a premium fifth wheel toy hauler. The RV is prepped for solar panels, allowing you to harness renewable energy while camping off-grid. The unit also includes a central vacuum system, a washer/dryer prep area, and tankless water heating for added comfort and convenience. With its advanced construction and thoughtful design, the Momentum M-Class 344M is built to provide reliable performance and comfort on every adventure.

Overall, the Grand Design RV Momentum M-Class 344M is the ultimate toy hauler for those who want to combine the thrill of outdoor recreation with the luxury of a high-end RV. Its spacious garage, premium interior, and modern amenities make it the perfect home on wheels for extended road trips, weekend getaways, or full-time RV living. Whether you're exploring off-the-beaten-path destinations or enjoying the comforts of a well-equipped RV park, the Momentum M-Class 344M delivers a superior travel experience that caters to both your adventurous and comfort-seeking sides.

Four season comfort without the front lobby

Extreme R&R - Our top-of-the-line Momentum M-CLASS Fifth Wheel Toy Haulers are — inside and out — our most luxurious Toy Haulers. With the comfort of a master suite and master bath, home’s now a long way from your house.

Make your Momentum stand out with Optional Full Body Paint - ONYX, ONYX W/ BLUE, ONYX W/ RED, ONYX W/ ORANGE, STERLING, STERLING W/ BLUE, STERLING W/ RED, STERLING W/ ORANGE, STERLING W/ RED, WHITE, AND BLUE 

SuperChassis

• 101" Wide Body Chassis - A full 5” wider than many coaches in its class, the widebody chassis allows for more livable floor space with deeper sliderooms, wider sofas in rear lounge models, and space saving sliding pocket doors into the bathrooms…all at a shorter towing length.

• Wide Rail Design - Heavy duty I-beam main rails are placed further outward on the chassis. This wider rail placement provides a more stable jack stance, and allows for the slideroom gearpacks to be enclosed inside the frame rails (rather than outside).

• No Wheel Wells - A true toy hauler with no wheel wells to maximize cargo option. Not to mention more floor space for camping.

• Dovetail Entry - Dovetails ensure you have a longer ramp and softer angle for loading your toys.

MORryde CRE3000 Suspension - When it comes to suspension performance, it’s all about suspension travel. Increased travel means smoother towing, improved towability and better protection from damaging road shock.

Cooper Tires - 17.5" All-Steel H-Rated Tires. Chip Guard: Protects from chips or cuts. Scrub Guard: Minimizes wear from starts, stops, tight turns and curb impacts. Speed Rating: 75 MPH. Load Rating: 4,805 LBS

ABS Brakes

Stealth 3+ Smart A/C System

• Run THREE 15K ACs at the SAME TIME! We combine high efficiency AC’s and an energy management system to achieve the perfect balance of efficiency and power! Add an Optional 3rd AC for Maximum Cooling Power!

• ULTRA QUIET - Up to 2x Quieter than the competition

• MAXIMUM AVAILABLE COOLING POWER - Dual 15,000 BTU A/Cs and an optional 3rd A/C

• AIRTITE CONNECTORS - All duct pieces are securely fastened together using special connector brackets.

• 23% MORE AIRFLOW than average of leading competitors

Sound by Rockford Fosgate

• Rockford Fosgate + Fifth Wheels

• Shake it up with Rockford Fosgate. Includes Rockford Fosgate head unit, interior and exterior speakers, an amplified subwoofer and over 500 watts of power!

• Stage 1 Package - 500+ Watts of Total Power (Standard):

• Rockford Fosgate Source Unit (App Controllable)

• 10" Powered Interior Subwoofer

• 6.5" 3-Way Interior Speakers

• Stage 2 Package - 900+ Watts of Total Power (Optional):

• Rockford Fosgate Source Unit (App Controllable)

• 10" Powered Interior Subwoofer

• Six 6.5" 3-Way Interior Speakers

• 10" Exterior Subwoofer

• Two 6.5" Color Optix™ 2-Way Speakers

• 400 Watt 4-Channel Amplifier

• Exterior Rockford Fosgate Source Unit (App Controllable)

Solar Package - Solar Power now comes STANDARD. Camp longer and in more places with the factory-installed 330W Roof Mounted Solar Panel, 50 AMP Charge Controller with Bluetooth Module, Inverter Prep, (2) USB Dock Ports, and 20 cu. ft. 12V Refrigerator standard on all Momentum M-Class's. No camping spot is off-limits. Just add batteries and go. Included in the standard solar package for Momentum M-Class: 330W Solar Panel, 50 AMP Charge Controller, and 20 cu ft 12 Volt Refrigerator

Constructed to a Superior Standard

• Thermal Roof Design (R-40) - Fiberglass insulation and a layer of radiant foil insulation cover the roof. Grand Design goes further by extending both insulation layers the full length of the roof and around to the bottom of the front cap.

• Full Laminated Walls (R-11) - Sidewalls, ramp door, slideroom endwalls, and slideroom roof are all welded aluminum framed and laminated with rigid foam insulation. Many others use wood framing and soft fiberglass insulation in the sliderooms that can settle over time and leave uninsulated air gaps.

• Triple Insulated Main Floor (R-45) - The underbelly is lined with a radiant foil insulation barrier (Layer 1) and is then covered with fiberglass insulation that wraps all the way up the sides of the frame rails (Layer 2). The main floor enhances the R-Value with yet another layer of fiberglass insulation (Layer 3).

• Triple Insulated Garage Floor (R-40) - While many toy hauler garage floors are NOT insulated, our exclusive garage floor design provides 3 layers of insulation. A base layer of radiant foil insulation (Layer 1) is topped with fiberglass insulation (Layer 2), and finishes with a second layer of radiant foil insulation on the underside of the garage floor (Layer 3).

• 1.5” Insulated Baggage Doors - Rigid Foam insulation lines the inside of our heavy duty baggage doors.

• Vented Attic - To maximize the effectiveness of the roof insulation, a vented attic allows condensation to escape the roof structure.

• Insulated Gooseneck - Radiant foil insulation under the gooseneck is a place often forgotten by others.

• Rail-Tite Underbelly Seal - Rigid aluminum rails are fastened around the perimeter of the underbelly to keep the corrugated barrier up tight against the frame for a better seal from the elements.

Four Seasons RV - we believe in making dreams of adventure a reality. As a small, family-owned dealership specializing in RV sales and service, we take pride in our commitment to customer satisfaction and transparency. With our "Where the fun begins" slogan as our guiding principle, we strive to be more than just a place to buy an RV – we're your trusted partners in exploration. Our knowledgeable product specialists are passionate about helping you find the perfect RV to suit your lifestyle and aspirations. And with our straightforward pricing and no additional fees policy, you can trust that your RV buying experience will be both seamless and enjoyable. From the moment you step onto our lot, to the day you drive off into the sunset, we're here to support you every step of the way. Experience the difference with Four Seasons RV, where every journey begins with excitement and possibility.