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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
