2026 Grand Design Momentum M-Class 399M

New Toy Hauler in Southaven, Mississippi, 38671

$154,995.00

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New 2026 Grand Design Momentum M-Class 399M available in Southaven, Mississippi

2026 Grand Design Momentum M-Class 399M - New Toy Hauler For Sale by Southaven RV & Marine in Southaven, Mississippi

2026 Momentum M-Class 399M by Grand Design from Southaven RV & Marine in Southaven, Mississippi

Unit Specs

In Stock

Stock #GR2490
Year2026
ManufacturerGrand Design RV
Make Grand Design
ModelMomentum M-Class
Floorplan399M
Type Toy Hauler
ConditionNew
VIN573FM4734TBB04792
Price $195,986.00
Sale Price $154,995.00
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Looking to buy a 2026 Grand Design Momentum M-Class Toy Hauler RV?

2026 Grand Design Momentum M-Class 399M

Our top-of-the-line Momentum 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.

Features may include:

Thermal Roof Design (R-40)*

Fully Laminated Walls (R-11)*

Triple Insulated Main Floor (R-45)*

Triple Insulated Garage Floor (R-40)*

1.5" Insulated Baggage Doors

Vented Attic

Insulated Gooseneck

Rail-Tite Underbelly Seal

Your camping memories will be unforgettable in this 2026 Grand Design Momentum M-Class 399M. By owning this 2026 Grand Design Momentum M-Class 399M, you’re joining the Grand Design family!

2026 Grand Design Momentum M-Class 399M Features

2026 Grand Design Momentum M-Class 399M Specifications

General

MSRP

$174,278

Dimensions

Height

13' 6"

Height (interior)

8' 5"

Length

44' 10"

Width

8' 5"

Weights

Dry Weight

18,000 lbs

GVWR

22,500 lbs

Hitch Weight

3,464 lbs

Payload Capacity

4,500 lbs

Capacities

Refrigerator Capacity

20 cu ft

Sleep Capacity

Water Capacity - Black

52 gal

Water Capacity - Fresh

140 gal

Water Capacity - Grey

104 gal

Exterior

# Awnings

# Axles

# Doors

# Slides

Chassis

101" Wide Body Super Chassis w/Drop-Frame Storage

Hitch

Fifth Wheel

Rear Opening

Ramp

Electrical

# A/C

A/C Spec

30,000 BTU

*MFG Specs are for base unit. Certain options may change specifications listed. Please consult dealer for more details. Data is provided by a 3rd party. RVUSA.com cannot guarantee the accuracy of the data presented.