2026 Grand Design Momentum M-Class 399M
New Fifth Wheel in Grain Valley, Missouri, 64029
Unit Specs
- Stock #T128404
- Year2026
- ManufacturerGrand Design RV
- Make Grand Design
- ModelMomentum M-Class
- Floorplan399M
- Type Fifth Wheel
- ConditionNew
- VIN573FM4737TBB04589
- Price $186,840.00
- Sale Price $164,495.00
- Need to know your payment? Use our RV Loan Calculator!
- Sleeps9
Your camping memories will be unforgettable in this 2026 Grand Design Momentum M-Class 399M. Be a part of the Grand Design family with this 2026 Grand Design Momentum M-Class 399M. If you’re looking for a family RV, you’ve found it: this rig sleeps 9.
2026 Grand Design Momentum M-Class 399M Features
2026 Grand Design Momentum M-Class 399M Specifications
MSRP
$174,278
Height
13' 6"
Height (interior)
8' 5"
Length
44' 10"
Width
8' 5"
Dry Weight
18,000 lbs
GVWR
22,500 lbs
Hitch Weight
3,464 lbs
Payload Capacity
4,500 lbs
Refrigerator Capacity
20 cu ft
Sleep Capacity
6
Water Capacity - Black
52 gal
Water Capacity - Fresh
140 gal
Water Capacity - Grey
104 gal
# Awnings
3
# Axles
3
# Doors
3
# Slides
3
Chassis
101" Wide Body Super Chassis w/Drop-Frame Storage
Hitch
Fifth Wheel
Rear Opening
Ramp
# A/C
1
A/C Spec
30,000 BTU
2026 Grand Design Momentum M-Class 399M Literature
Blue Compass RV Kansas City
1100 NW Pamela Blvd
Grain Valley, MO 64029
Member Since 2024
See 533 ReviewsUnit Specs
- Stock #T128404
- Year2026
- ManufacturerGrand Design RV
- Make Grand Design
- ModelMomentum M-Class
- Floorplan399M
- Type Fifth Wheel
- ConditionNew
- VIN573FM4737TBB04589
- Price $186,840.00
- Sale Price $164,495.00
- Need to know your payment? Use our RV Loan Calculator!
- Sleeps9
Email Seller
Request More Info on this 2026 Grand Design Momentum M-Class 399M Offered for sale by Blue Compass RV Kansas City
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