2026 GRAND DESIGN MOMENTUM M-CLASS 399M

Knoxville, TN • Dealer • Showroom

45

1

Rv TypeToy Hauler

Length44 ft

Fuel Type-

Mileage-

RV DetailsStock #: 21175567

ConditionNew

GVWR23500 lbs

Sleeps4

FloorplanMOMENTUM M-CLASS

Slide Outs3

Water Cap.140 gal

Description

2026 Grand Design Momentum M-Class 399M, New 2026 Grand Design Momentum M-Class 399M The 2026 Grand Design Momentum M-Class 399M is built for travelers who want serious garage space without giving up the comforts of home. With a 12'6" garage, spacious living area, and comfortable front bedroom, this toy hauler gives you the flexibility to bring your favorite toys along while still enjoying a residential-style setup at camp. The garage features a side patio, adjustable tie-down system, fold-up pet dish, overhead storage, and an entertainment wall, giving you a versatile space for your gear and downtime. Moving into the main living area, you'll find theater seating, a large entertainment center, hybrid desk/dinette, and a well-equipped kitchen with a 20 cu. ft. refrigerator. The private front bedroom features a King Bed, while the bathroom includes a spacious shower and plenty of storage. This Momentum is equipped with a 6K generator, MorRyde 7K Independent Suspension 2.0 with disc brakes, triple axles, and a third A/C, adding capability and comfort for your travels. With its impressive garage, outdoor living space, and upgraded chassis features, the 399M is ready for adventures that go well beyond the campground. KEY FEATURES & HIGHLIGHTS 12'6" Garage Side Patio 6K Generator MorRyde 7K Independent Suspension 2.0 With Disc Brakes Triple Axle Third A/C King bed upgrade WHY BUY FROM CAMPERS INN RV? At Campers Inn RV, our RV Match Makers are dedicated to helping you find the right RV for your adventures. From knowledgeable product specialists and financing options to expert service after the sale, we're here to help make your RV ownership experience enjoyable from start to finish. SEE IT IN PERSON Come experience the New 2026 Grand Design Momentum M-Class 399M and see how its massive garage, side patio, and upgraded suspension make it ready for your next adventure. Call Or Text 865-933-7213 today to schedule your personal tour!s Inn RV of Knoxville. Luxury Interior Package; Exterior Package; Weather-tek Insulation Package; Under Unit LED Light Kit; Bedroom A/C; 20 Cu. Ft. 12V Refrigerator; OmniConnect; Upgraded H-rated Tires w/ 17.5 Wheels; SafeRide RV Roadside Assistance; RVIA Seal; 6K Watt Generator; Gen III 3 Season Door w/ Sliding Windows; 3rd A/C Prep; Rockford Fosgate Stage 1 Stereo; Momentum Garage Suite w/ p2k Bed lift; Solar + Package; Kitchen Power fan w/ Rain Sensor; Garage LED HD TV; Auxiliary Fresh Water Tank; King Bed Upgrade; 3rd A/C; Heat Pump A/C; Momentum Patio Chairs; Rear Aluminum Deck System w/Rear Power Awning; MorRyde 7K Independent Suspension 2.0 w/ Disc Brakes Triple Axle

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