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Condition: New
Exterior Length: 3 ft 8 in
Sleeps: 6
Number of Slide Outs: 3
Fresh Water Tank Capacity: 98 gal
Stock Number: 346147
Description: NEW 2026 GRAND DESIGN MOMENTUM G-CLASS 394G – 346147
**Grand Design Momentum G-Class toy hauler 394G highlights:**
* 15' Separate ...
Updated: Thursday, September 10, 2026 03:34 AM
Seller: General RV Center - Canton
Condition: New
Exterior Length: 3 ft 8 in
Sleeps: 6
Number of Slide Outs: 3
Fresh Water Tank Capacity: 98 gal
Stock Number: 346145
Description: NEW 2026 GRAND DESIGN MOMENTUM G-CLASS 394G – 346145
Grand Design Momentum G-Class toy hauler 394G highlights:
15' Separate Garage...
Updated: Monday, August 17, 2026 10:16 AM
Seller: General RV Center
Condition: New
Exterior Length: 44 ft 11 in
Sleeps: 6
Number of Slide Outs: 3
Gross Vehicle Weight: 22,500 lb
Number of Axles: Tandem
Description: New 2026 Grand Design Momentum G-Class 394G
Details: Grand Design Momentum G-Class toy hauler 394G highlights: 15' Separate Garage Fireplace Priv...
Updated: Saturday, October 10, 2026 06:49 AM
Seller: Blue Compass RV - Cincinnati
New 2026 GRAND DESIGN MOMENTUM G CLASS 415G
Fort Pierce, Florida
MSRP$142,961 USD $89,999
Condition: New
Exterior Length: 3 ft 8 in
Sleeps: 6
Number of Slide Outs: 3
Number of Axles: Tri
Exterior Height: 13 ft 6 in
Description: NEW 2026 GRAND DESIGN MOMENTUM G-CLASS 415G – 336876
Discover the 2026 Grand Design Momentum G-Class 415G, a luxurious haven on wheels d...
Updated: Monday, August 17, 2026 10:16 AM
Seller: General RV Center - Fort Pierce
Condition: New
Exterior Length: 44 ft 11 in
Fresh Water Tank Capacity: 98 gal
Stock Number: 45876
Exterior Color: White
VIN: 573FM4739SBB04009
Description: Overview Discover the 2025 Grand Design Momentum G-Class 415G: Where Every Journey Becomes an Unforgettable Experience! Step into the world of luxu...
Updated: Tuesday, October 13, 2026 03:37 PM
Seller: RV Country - Fife, WA
Condition: Used
Exterior Length: 44 ft 11 in
Sleeps: 7
Number of Slide Outs: 3
Gross Vehicle Weight: 20,000 lb
Number of Axles: Tandem
Description: Used 2024 Grand Design Momentum G-Class 415G
Details: Grand Design Momentum G-Class toy hauler 415G highlights: 14' Separate Garage Fireplace Pri...
Updated: Thursday, October 15, 2026 09:11 AM
Seller: America Go RV - Comfort
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
Used 2017 GRAND DESIGN MOMENTUM M CLASS 328M
Southaven, Mississippi
MSRP$44,995 USD $38,995
Condition: Used
Number of Slide Outs: 1
Fresh Water Tank Capacity: 117 gal
Stock Number: BR1087A
VIN: 573FM3720H1204092
Gray Water Tank Capacity: 104 gal
Description: 2017 Grand Design Momentum M-Class 328M
***FRESH TRADE IN***
Updated: Thursday, October 15, 2026 08:13 AM
Seller: Southaven RV
Condition: Used
Exterior Length: 35 ft 11 in
Sleeps: 8
Number of Slide Outs: 2
Gross Vehicle Weight: 16,500 lb
Exterior Height: 13 ft 6 in
Description: Used 2015 Grand Design Momentum 328M
Details: This M-Class Momentum toy hauler fifth wheel by Grand Design has got you covered for all of your vac...
Updated: Sunday, October 18, 2026 03:13 AM
Seller: King's Campers
Condition: Used
Exterior Length: 35 ft 11 in
Sleeps: 8
Number of Slide Outs: 2
Gross Vehicle Weight: 16,500 lb
Exterior Height: 13 ft 6 in
Description: Used 2015 Grand Design Momentum M-Class 328M
Details: This M-Class Momentum toy hauler fifth wheel by Grand Design has got you covered for all of ...
Updated: Thursday, October 15, 2026 09:11 AM
Seller: America Go RV - Comfort
Used 2023 GRAND DESIGN MOMENTUM M CLASS 336M
Elizabethtown, Pennsylvania
MSRP$79,999 USD $72,999
Condition: Used
Exterior Length: 3 ft 3 in
Sleeps: 6
Number of Slide Outs: 5
Fresh Water Tank Capacity: 110 gal
Stock Number: 362888
Description: USED 2023 GRAND DESIGN MOMENTUM M CLASS 336M – 362888
The 2023 Grand Design Momentum M-Class 336M is the epitome of luxury and functiona...
Updated: Wednesday, September 02, 2026 03:31 AM
Seller: General RV Center - Elizabethtown
New 2027 GRAND DESIGN MOMENTUM M CLASS 344M
Village Of Clarkston, Michigan
MSRP$187,166 USD $139,995
Condition: New
Exterior Length: 3 ft 3 in
Sleeps: 6
Number of Slide Outs: 3
Fresh Water Tank Capacity: 140 gal
Stock Number: 365693
Description: NEW 2027 GRAND DESIGN MOMENTUM 344M – 365693
Grand Design Momentum 344M Highlights:
11' Garage
Dual Entry Bath
Queen Bed
Loft Bed
...
Updated: Friday, September 11, 2026 03:31 AM
Seller: General RV Center - Clarkston
New 2027 GRAND DESIGN MOMENTUM M CLASS 344M
Orange Park, Florida
MSRP$187,166 USD $139,995
Condition: New
Exterior Length: 3 ft 3 in
Sleeps: 6
Number of Slide Outs: 3
Fresh Water Tank Capacity: 140 gal
Stock Number: 365694
Description: NEW 2027 GRAND DESIGN MOMENTUM 344M – 365694
Grand Design Momentum 344M Highlights:
11' Garage
Dual Entry Bath
Queen Bed
Loft Bed
...
Updated: Thursday, September 10, 2026 07:21 AM
Seller: General RV Center - Jacksonville
New 2027 GRAND DESIGN MOMENTUM M CLASS 344M
Winter Garden, Florida
MSRP$187,166 USD $139,995
Condition: New
Exterior Length: 39 ft
Sleeps: 6
Number of Slide Outs: 3
Fresh Water Tank Capacity: 140 gal
Stock Number: 365691
Description: NEW 2027 GRAND DESIGN MOMENTUM 344M – 365691
Grand Design Momentum 344M Highlights:
11' Garage
Dual Entry Bath
Queen Bed
Loft Bed
...
Updated: Wednesday, September 30, 2026 03:31 AM
Seller: Independence RV by General RV Center - Winter Garden
Condition: New
Exterior Length: 3 ft 3 in
Sleeps: 6
Number of Slide Outs: 3
Fresh Water Tank Capacity: 140 gal
Stock Number: 365692
Description: NEW 2027 GRAND DESIGN MOMENTUM 344M – 365692
Grand Design Momentum 344M Highlights:
11' Garage
Dual Entry Bath
Queen Bed
Loft Bed
...
Updated: Saturday, September 12, 2026 03:31 AM
Seller: General RV Center - Canton
Condition: New
Exterior Length: 39 ft 11 in
Sleeps: 6
Number of Slide Outs: 3
Gross Vehicle Weight: 19,000 lb
Number of Axles: Tri
Description: New 2027 Grand Design Momentum 344M
Details: Grand Design Momentum toy hauler 344M highlights: Dual Opposing Slides Two Power Awnings 11' Separat...
Updated: Thursday, October 15, 2026 09:33 AM
Seller: McClain's RV SuperStores - OKC
New 2027 GRAND DESIGN MOMENTUM M CLASS 344M
Fort Worth, Texas
MSRP$194,035 Call for price
Condition: New
Exterior Length: 39 ft 11 in
Sleeps: 6
Number of Slide Outs: 3
Gross Vehicle Weight: 19,000 lb
Number of Axles: Tri
Description: New 2027 Grand Design Momentum 344M
Details: Grand Design Momentum toy hauler 344M highlights: Dual Opposing Slides Two Power Awnings 11' Separat...
Updated: Saturday, October 17, 2026 08:05 AM
Seller: McClain's RV SuperStores - Fort Worth
Condition: New
Exterior Length: 39 ft 11 in
Fresh Water Tank Capacity: 140 gal
Stock Number: 46294
Exterior Color: White
VIN: 573FM4227TBB04428
Description: Overview Welcome Aboard the 2026 Grand Design Momentum M-Class 344M: Redefining Travel with Every Mile! The 2026 Grand Design Momentum M-Class 344M...
Updated: Tuesday, October 13, 2026 03:37 PM
Seller: RV Country - Fife, WA
Condition: New
Exterior Length: 39 ft 11 in
Sleeps: 6
Number of Slide Outs: 3
Gross Vehicle Weight: 19,000 lb
Number of Axles: Tri
Description: New 2026 Grand Design Momentum 344M
Details: Grand Design Momentum toy hauler 344M highlights: Dual Opposing Slides Two Power Awnings 11' Separat...
Updated: Thursday, October 15, 2026 09:33 AM
Seller: McClain's RV SuperStores - Rockwall
Condition: New
Exterior Length: 39 ft 11 in
Sleeps: 6
Number of Slide Outs: 3
Gross Vehicle Weight: 19,000 lb
Number of Axles: Tri
Description: New 2026 Grand Design Momentum 344M
Details: Grand Design Momentum toy hauler 344M highlights: Dual Opposing Slides Two Power Awnings 11' Separat...
Updated: Thursday, October 15, 2026 09:33 AM
Seller: McClain's RV SuperStores - Corinth
New 2026 GRAND DESIGN MOMENTUM M CLASS 344M
Winter Garden, Florida
MSRP$163,667 USD $112,999
Condition: New
Exterior Length: 3 ft 3 in
Sleeps: 7
Number of Slide Outs: 3
Fresh Water Tank Capacity: 140 gal
Stock Number: 358525
Description: NEW 2026 GRAND DESIGN MOMENTUM M CLASS 344M – 358525
**Grand Design Momentum M-Class 344M highlights:**
* 11' Toy Hauler Garage
* ...
Updated: Monday, August 17, 2026 10:16 AM
Seller: Independence RV by General RV Center - Winter Garden
Condition: New
Exterior Length: 3 ft 3 in
Sleeps: 7
Number of Slide Outs: 3
Fresh Water Tank Capacity: 140 gal
Stock Number: 346153
Description: NEW 2026 GRAND DESIGN MOMENTUM M CLASS 344M – 346153
Step into the world of luxury and adventure with the 2026 Grand Design Momentum M-C...
Updated: Monday, August 17, 2026 10:16 AM
Seller: General RV Center - Illinois
