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Condition: New
Exterior Length: 44 ft 10 in
Fresh Water Tank Capacity: 140 gal
Stock Number: 46525
VIN: 573FM4733TBB04797
Exterior Width: 8 in
Description: Overview Venture into Luxury with the 2026 Grand Design Momentum M-Class 399M: Your Home on the Open Road! Welcome to a new era of travel with the ...
Updated: Tuesday, October 13, 2026 03:37 PM
Seller: RV Country - Fresno
Condition: New
Exterior Length: 44 ft 10 in
Fresh Water Tank Capacity: 140 gal
Stock Number: 46524
VIN: 573FM473XTBB04795
Exterior Width: 8 in
Description: Overview Elevate Your Explorations with the 2026 Grand Design Momentum M-Class 399M: Luxury Meets Adventure! The 2026 Grand Design Momentum M-Class...
Updated: Tuesday, October 13, 2026 03:37 PM
Seller: RV Country - Laughlin, NV
Condition: New
Exterior Length: 44 ft 10 in
Sleeps: 9
Number of Slide Outs: 3
Gross Vehicle Weight: 22,500 lb
Number of Axles: Tri
Description: 2026 Grand Design Momentum M-Class 399M
**IN STOCK**DON'T TELL GRAND DESIGN**
Stock No. GR2490
$139,995.00
Our top-of-the-line Momentum Fi...
Updated: Thursday, October 15, 2026 12:26 PM
Seller: Southaven RV
Condition: New
Exterior Length: 3 ft 8 in
Sleeps: 4
Number of Slide Outs: 3
Fresh Water Tank Capacity: 140 gal
Stock Number: 358528
Description: NEW 2026 GRAND DESIGN MOMENTUM M CLASS 399M – 358528
**Grand Design Momentum fifth wheel toy hauler 399M highlights:**
* Front Private ...
Updated: Monday, August 17, 2026 10:16 AM
Seller: Independence RV by General RV Center - Winter Garden
Condition: New
Exterior Length: 3 ft 8 in
Sleeps: 4
Number of Slide Outs: 3
Fresh Water Tank Capacity: 140 gal
Stock Number: 346163
Description: NEW 2026 GRAND DESIGN MOMENTUM M CLASS 399M – 346163
**Grand Design Momentum fifth wheel toy hauler 399M highlights:**
* Front Private ...
Updated: Monday, August 17, 2026 10:16 AM
Seller: General RV Center - Fort Pierce
Condition: New
Exterior Length: 44 ft 10 in
Sleeps: 4
Number of Slide Outs: 3
Gross Vehicle Weight: 23,500 lb
Number of Axles: Tri
Description: New 2026 Grand Design Momentum 399M
Details: Grand Design Momentum fifth wheel toy hauler 399M highlights: Front Private Bedroom Kitchen Island ...
Updated: Monday, October 05, 2026 12:22 PM
Seller: Blue Compass RV - Columbia
Condition: New
Exterior Length: 3 ft 8 in
Sleeps: 4
Number of Slide Outs: 3
Fresh Water Tank Capacity: 140 gal
Stock Number: 338373
Description: NEW 2026 GRAND DESIGN MOMENTUM M CLASS 399M – 338373
Grand Design Momentum fifth wheel toy hauler 399M highlights:
Front Private Bedroom...
Updated: Friday, August 21, 2026 03:32 AM
Seller: General RV Center - Virginia
