RV Details
- Year: 2021
- Model: MOMENTUM M-CLASS 351M
- Listing ID: 7039387
- Partner ID: 5040757523
- Posted On: May 29, 2026
- Updated On: Jun 19, 2026
Description
2021 Grand Design Momentum M-Class 351M Fully Loaded.
Private party NO TAX or Dealer fees
THIS ONE HAS ALL THE OPTIONS!
GARAGED, Lightly used, Taken out to take pictures.
HAS IT'S OWN HYDRAULIC BRAKES ON 8K UPGRADED AXLES! This is a big upgrade if your concerned about stopping power with larger toys.
This is a highly optioned, one-owner 2021 Grand Design Momentum 351M fifth-wheel toy hauler in outstanding condition. With ~38'9" length, 3 slides, a spacious garage, and luxury finishes throughout, it's perfect for full-time living, family adventures, or hauling toys (ATVs, motorcycles, side-by-sides, golf carts, etc.). Grand Designs renowned quality + nearly every available factory upgrade + premium aftermarket additions make this one of the nicest 351Ms available.
Key Specs:
All of the upgrades!
Length: ~38'9"
Dry Weight: ~13,800 lbs
Sleeps: 8
3 Slide-outs
Triple A/C capable + Onan generator + powerful lithium solar system
M-Class Luxury Interior, Exterior, and Garage Packages
Weather-Tek Insulation Package
Under Unit LED Light Kit
2nd A/C (Bedroom) + 3rd A/C Prep
Kitchen & Garage Power Fans w/ Rain Sensors
Onan 5.5kW Gasoline Generator
Upgraded Solar Package: 300W Panel + Controller + 2000W Inverter + 300Ah Lithium Ion Batteries + Premium Wiring Setup
18 cu. ft. Dual Fuel Residential Refrigerator/Freezer (rare propane + electric model highly sought after!)
Garage LED HD TV Exterior TV
Auxiliary Fresh Water Tank (40 Gallons)
Happi-Jac Electric Bunk System w/ Folding Sofas
Rear Aluminum Deck System w/ Rear Power Awning
Exterior Entertainment Center
Slide-Out Toppers
Gen II 3 Season Door w/ Sliding Windows
Dual Pane Windows
Premium V4 Rockford Fosgate Speaker Upgrade w/ Amps & Interior/Exterior Subs
Upgraded Cooper H-Rated Tires w/ 17.5" Wheels
8K Axles w/ Hydraulic Disc Brakes
Upgraded Morydz Pin Box
Full-Body Paint (Solid Color)
1/2 Bathroom in Garage + Garage Screen Wall (Pull Down)
Heat Pump
Winterization Package + RVIA Seal
And much more!
This rig has seen light use and has been garaged its entire life, meaning its protected from the elements and remains in excellent condition inside and out. Its turn-key..ready for the road or boondocking.
The rare 18 cu. ft. dual fuel residential fridge combined with the 300Ah lithium battery bank gives you massive storage and serious off-grid capability.
This is a premium, ARIZONA well-cared-for unit with most all upgrades!