Used 2022 Grand Design Momentum 399TH Toy Hauler Fifth Wheel
The Momentum 399TH combines luxury fifth wheel living with serious toy-hauling capability.
Used 2022 Grand Design Momentum 399TH Fifth Wheel Toy Hauler
Adventure meets luxury in this Used 2022 Grand Design Momentum 399TH, a premium fifth wheel toy hauler built for travelers who want to bring their favorite toys without sacrificing comfort. Whether you're heading to the dunes, racetrack, mountains, or your favorite campground, this Momentum delivers exceptional cargo capacity, residential amenities, and four-season capability.
Highlights
• 13' Separate Garage
• Fold-Down Side Patio with Exterior TV
• Bath and a Half
• Dual Entry Doors
• Kitchen Island with Bar Stools
• 60-Gallon Fuel Station
• Dual Slide-Outs
• Theater Seating
• Free-Standing Dinette
• Four-Season Construction
Key Features
• Spacious 13' garage with Fast Ramp rear ramp door
• Ram-Air garage ventilation system on both sides
• 2,500 lb. rated flush-mount tie-downs for secure toy transport
• Protective diamond plate garage sidewalls
• Convenient half bath located in the garage area
• Garage LED TV and additional storage space
• Large living area with opposing slides for maximum interior room
• Residential-style kitchen island with bar stools
• Theater seating for premium comfort
• Free-standing dining table for meals and game nights
• Spacious master bedroom with residential comfort
• Multiple entertainment options inside and out
• Fold-down side patio creating an elevated outdoor living space
• Exterior TV for tailgating and outdoor gatherings
• Massive storage throughout
Construction and Premium Features
• Thermal roof design for all-season camping
• Fully laminated walls for durability and insulation
• Triple insulated garage floor
• Insulated gooseneck construction
• Rail-Tite underbelly protection
• MORryde CRE3000 suspension system
• Rubber pin box for smoother towing
• Upgraded axle hangers for enhanced performance
• Central vacuum system with tools and dust pan
• Raised panel hardwood cabinet doors with hidden hinges
• Color-changing LED accent lighting
• Premium furniture with heat, massage, and LED lighting package
What Makes This RV Stand Out Above the Rest
The Momentum 399TH combines luxury fifth wheel living with serious toy-hauling capability. The unique fold-down side patio creates an outdoor entertainment area unlike most toy haulers, while the 13' garage, bath and a half, 60-gallon fuel station, and residential-style interior make it ideal for extended adventures. Its premium four-season construction and luxury finishes place it among the most sought-after toy haulers in its class.
Why Buy From Campers Inn RV
Campers Inn RV is dedicated to helping families create unforgettable travel experiences. With one of the largest selections of new and used RVs, knowledgeable RV professionals, competitive financing options, and dedicated service support, Campers Inn RV makes the buying process simple and enjoyable. From your first walkthrough to years of adventures ahead, our team is committed to helping you get the most out of your RV lifestyle.
Start loading your toys, gather your crew, and discover where the next adventure leads in this impressive Grand Design Momentum 399TH.
Excellent service and kid environment! Christine was exceptionally great! I recommend these folks if you're looking to buy an RV!!!! - Jason
You Save: $4,800
Sale Price: $79,990
Stock# 116625X
| Sleeps | 3 |
| Slides | 3 |
| Length | 43 ft 1 in |
| Ext Height | 13 ft 5 in |
| Hitch Weight | 3400 lbs |
| GVWR | 20000 lbs |
| Dry Weight | 15900 lbs |
| Fresh Water Capacity | 140 gals |
| Grey Water Capacity | 104 gals |
| Black Water Capacity | 104 gals |
| Tire Size | 17" |
| Furnace BTU | 40000 btu |
| Fuel Capacity | 60 gals |
| Available Beds | Queen |
| Refrigerator Size | 18 cu ft |
| Cooktop Burners | 3 |
| Number of Awnings | 2 |
| Axle Weight | 7000 lbs |
| Garage Size | 13 ft |
| LP Tank Capacity | 60 lbs |
| Water Heater Capacity | 12 gal |
| Water Heater Type | Gas/Electric |
| TV Info | LR 49" LED TV, BR 32" LED TV, Garage 32" LED TV, Ext. LED TV |
| Awning Info | 14' & 16' Power w/LED Lights |
| Axle Count | 3 |
| Washer/Dryer Available | Yes |
| Shower Type | Sunken Tub/Shower |
| Electrical Service | 50 amp |
| VIN | 573FM4539N1123007 |
Momentum 399TH Reviews
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Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.


