+6-
43ft long
-
14,700 lbs
-
Sleeps 8
-
3 slides
-
Kitchen IslandBath and a Half
381M Floorplan
Specifications
| Sleeps | 8 | Slides | 3 |
| Length | 42 ft 9 in | Ext Height | 13 ft 5 in |
| Hitch Weight | 2800 lbs | GVWR | 20000 lbs |
| Dry Weight | 14700 lbs | Fresh Water Capacity | 157 gals |
| Grey Water Capacity | 78 gals | Black Water Capacity | 78 gals |
| Tire Size | 16" | Furnace BTU | 40000 btu |
| Fuel Capacity | 60 gals | Number Of Bunks | 1 |
| Available Beds | Queen | Refrigerator Type | Four Door |
| Refrigerator Size | 18 cu ft | Convection Cooking | Yes |
| Cooktop Burners | 3 | Number of Awnings | 2 |
| Axle Weight | 7000 lbs | Garage Size | 15 ft |
| LP Tank Capacity | 30 lbs | Water Heater Capacity | 12 gal |
| Water Heater Type | Gas/Electric | AC BTU | 30000 btu |
| TV Info | LR 49" LED | Awning Info | 18' & 10' Power |
| Axle Count | 3 | Washer/Dryer Available | Yes |
| Number of LP Tanks | 2 | Shower Type | Shower w/Seat |
| Electrical Service | 30 amp | VIN | 573FM4538J1206809 |
Description
Used 2018 Grand Design Momentum M-Class 381M Toy Hauler – Adventure Without Limits
The 2018 Grand Design Momentum M-Class 381M is where rugged adventure meets upscale living. Built to carry your favorite off-road toys while offering all the luxuries of home, this toy hauler is perfect for thrill-seekers, campers, and families who crave both excitement and comfort. With a massive garage, bath and a half, and a beautifully designed living space, this RV makes it easy to blend outdoor fun with indoor relaxation.
Highlights and Key Features
• 15' garage with durable Tuff-Ply flooring and 2,500 lb. tie-downs for ATVs, dirt bikes, or gear
• Convenient half bath in the garage for quick cleanups without tracking dirt through the RV
• Loft area providing extra sleeping space or a fun hideout for kids
• Spacious main living area with four-seat sofa, headrests, and removable swivel table
• Entertainment center featuring a 49" LED TV and fireplace for cozy nights after the ride
• Gourmet-style kitchen with island, fold-up countertop, bar stools, and convection microwave
• Dual entry design for easy access from both the garage and main living area
• Full master bath with large shower and storage for added comfort
• Dual enclosed fuel station to keep your toys fueled and ready for adventure
• Central vacuum system with tools and dust pan for easy cleanup after outdoor fun
Built for Adventure, Designed for Comfort
The Momentum M-Class 381M isn’t just a toy hauler—it’s your home base for adventure. With its four-season Weather-Tek insulation, you can extend your camping trips into every season, whether you’re chasing mountain trails in the summer or enjoying desert rides in the winter. The garage is engineered for durability with triple insulation, oil- and gas-resistant flooring, and plenty of tie-downs to keep everything secure on the road.
Inside, Grand Design spares no detail. Large windows flood the living area with natural light, while the kitchen island makes meal prep easy and social. The loft adds flexibility for sleeping or storage, and the master bedroom ensures restful nights so you’re ready to hit the trails again in the morning.
Luxury Meets Playtime
After a day of riding, hiking, or exploring, unwind in the spacious living room with the glow of the fireplace and a movie on the big screen. Share meals around the island or relax on the plush sofa seating. With both a full bath and a half bath, morning routines are smooth even with the whole crew onboard. The combination of practical features and luxurious touches makes this Momentum the ultimate toy hauler for those who want it all.
Why Buy from Little Dealer Little Prices
At Little Dealer Little Prices, we know RVs aren’t just vehicles—they’re the gateway to adventure. That’s why we offer unbeatable pricing, a family-owned legacy of trust, and a team dedicated to helping you find the RV that fits your lifestyle. From expert guidance to ongoing support after your purchase, we make sure your camping journey is as smooth as possible. When you buy here, you’re not just getting an RV—you’re joining a community of adventurers who value quality, fun, and freedom.
The Used 2018 Grand Design Momentum M-Class 381M is more than a toy hauler—it’s your ticket to endless adventure with all the comforts of home. Whether it’s weekends at the dunes, week-long trail rides, or cross-country camping, this toy hauler is ready to keep up with your boldest journeys.
Features
Standard Features (2018)
Standard Build Packages
Exterior Package - Mandatory
- Satellite TV Prep (All TV Locations)
- Aluminum Quad Entry Steps - Garage Entry (N/A 376TH)
- 7,000 lb. Axles w/Self Adjusting Brakes, Wet Bolts and Bronze Bushings
- 16” Aluminum Wheels (120PSI Rated)
- West Lake® E-Rated Tires w/NitroFill™
- Slam-Latch Baggage Doors
- Frameless Tinted Windows
- Aluminum Quad Entry Steps - Main Entry
- Exterior Security Lights
- Power Patio Awning w/LED Lighting
- Folding Roof Ladder
- White Gel Coat Fiberglass Front Cap
- 12V Battery Disconnect
- All-In-One Exterior Utility Center
- 50 Amp Service
- Converter
- Enclosed Fuel Station w/ Dual Fuel Tank (Single Tank 328M and 376TH)
- Partial Paint Gel Coat Fiberglass Front Cap (M-Class only)
- Full Paint Gel Coat Fiberglass Front Cap (376TH, 397TH, 399TH only)
- Solid Step Quad Entry Step - Main Entry
Interior Package - Mandatory
- 49" Class LED TV in Living Area
- Stereo Entertainment System w/Bluetooth and App Based Controls in Living Area
- Washer/Dryer Prep
- 12 Gallon Gas/Electric Water Heater
- Roller Shade Window Coverings (Main Living Area and Bedroom)
- Recessed LED Puck Lighting
- Solid Surface Countertops w/ Sink Covers
- Stainless Steel Undermount Kitchen Sink
- Chef Inspired Range & Oven w/ Cover
- Kitchen Pantry w/ LED Light Strip
- Garage Control Panel (N/A 376TH)
Garage Package - Mandatory
- 32" Class LED TV in Garage (397TH and 399TH only)
- Protective Diamond Plate on Garage Sidewalls
- 2,500 lb. Rated Flush-Mount Tie-Downs
- Ram-Air Garage Vents Both Sides (N/A 376TH)
- Tuff-Ply Gas and Oil Resistant Garage Flooring
- Fast Ramp Rear Ramp Door (N/A 376TH)
- Triple Insulated Garage Floor (N/A 376TH)
Weather-Tek Package - Mandatory
- R-Value Equivalent (R-40 Roof / R-45 Floor / R-11 Sidewalls / R-40 Garage Floor / R-24 Slideroom Floor)
- Fully Enclosed and Heated, Underbelly and Storage Area
- Enclosed and Heated Low Point Drains
- Engineered Underbelly Airflow Heat Paths
- Stealth AC System w/ Insulated A/C Ducts
- Attic Vent
- Plumbing Line Insulation Barrier
Exterior
- Under Mount 16” Spare Tire
- 6-Point Hydraulic Leveling System
- Trailair® Roto-Flex™ Pin Box (Momentum only)
- Keyed Alike™ Ramp Door Latches
- 2nd Power Patio Awning w/ LED Lights
- 3rd Power Awning w/ LED Lights (Main Slide - 394M, 395M and 397TH) - Mandatory
- Front and Back Under Unit Blue LED Light Kit - Mandatory
- High-Gloss Gel Coat Exterior Sidewalls
- Full Paint Gel Coat Fiberglass Front Cap (Momentum only)
- Door Side Exterior Spray Port
Construction
- Drop Frame Chassis (12" over 10") (Momentum only)
- Straight Frame Chassis (12") (M-Class only)
- Trailair® Equa-flex® Suspension
Interior
- Interior Color Changing LED Accent Lighting
- Raised Panel Hardwood Cabinet Doors w/Hidden Hinges
- Sofa w/Headrest & Removable Swivel Tables (Includes Heat, Massage & LED Lighting Package)
- Wall Mounted "No-Pedestal" Table w/4 Chairs (Std 394M, 395M only, Momentum Only)
- Central Vacuum System w/ Tools and Dust Pan
Kitchen
- Convection Microwave (Momentum only)
- 18 Cu. Ft. Refrigerator
- 30" Stainless Steel Microwave w/ Ext. Vent (M-Class only)
- Residential Kitchen Faucet
- Window Behind Range (328M, 349M, 351M, 354M, 381M, 398M, 397TH, 399TH)
- Kitchen Barstools w/ Extended Countertops (349M, 351M, 381M, 398M, 397TH, 399TH only)
Bedroom
- Residential Style Headboard
- Under Bed Storage Area (N/A 376TH)
- Individually Switched Reading Lights Over Bed
- Bedside 110-Volt Outlets
- 60" X 80" Queen Memory Foam Mattress (Momentum only)
- 60" X 80" Queen Pillow Top Bed Mattress (M-Class only)
Bathroom
- One-Piece Fiberglass Shower w/Glass Door
- Skylight Above Shower
- Porcelain Toilet
- Medicine Cabinet w/Mirrored Door
Audio & Video
- No-Crank Digital TV Antenna w/Booster
- Satellite/Solar Roof Access Channel
- 32" Class LED TV in Bedroom (Momentum only)
- TV Prep in Garage (N/A 376TH)
- Exterior Entertainment Center w/LED TV & DVD (Momentum only- mandatory)
HVAC & Plumbing
- 12v High Power Fan (Kitchen) (Momentum - std.; M-Class - mandatory)
- 12v High Power Fan - Master Bath (Momentum only - std.)
- 12V Tank Heaters (All Tanks)
- 35k BTU High Capacity Furnace
- Fireplace w/ 5,000 BTU Electric Heater
- 15k BTU A/C - Middle/Main
- 2nd 15k BTU A/C - Bedroom (mandatory)
- 3rd 13.5k BTU A/C (Includes Energy Mgmt. System & 3-Zone Thermostat) (Momentum only - std.)
Garage
- Rear Cargo Loading & Backup LED Lights
Utilities
- OneControl™ 7" Touchscreen Control Panel w/App Controls and Redundant Slide Switches
- Generator Prep
Options
Exterior
- Dual Pane Window Upgrade
- Back-Up Camera (Camera Prep Standard)
- Slide-Out Awning Toppers
- Full Body Paint
Interior
- Super Sofa Upgrade - IPO Theatre Seats & Dinette (394M, 395M, 397TH, 399TH only)
- 2 Person Dinette and Sofa Recliners - IPO 4 Seat Sofa (N/A Momentum, 394M, 395M)
Kitchen
- Convection Microwave (M-Class option)
Bedroom
- King Bed Upgrade (NA 376TH)
Audio & Video
- Rockford Fosgate Speaker Package w/12" Sub and 300W Amp
- Exterior Entertainment Center w/LED TV & DVD (M-Class option)
HVAC & Plumbing
- 12v High Power Fan - Garage (N/A Momentum or with 3rd AC Option)
- 3rd 13.5k BTU A/C (Includes Energy Mgmt. System & 3-Zone Thermostat) (M-Class)
- Heat Pump A/C - Living Area (Momentum only)
Garage
- Quick Set Ramp Door Patio System w/ Steps and Power Awning Included (N/A 376TH)
- 3-Season Garage Wall (NA w/ Pull Down Garage Screen Wall) (N/A 376TH)
- Happi-Jac Electric Bunk System w/Folding Sofas (N/A 376TH)
Utilities
- Onan 5.5KW Gasoline Generator
See us for a complete list of features and available options!
All standard features and specifications are subject to change.
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Hilario from Glendale, AZGreat Customer Service
Everyone here is very courteous especially our sales rep Tyler, he’s the man!
Joe in finance is cool too -
Rhonda from Prescott Valley, AZJames, in Sales
James took excellent care of us, found our new unit and foot us out the door so easily!
Thank you James!! Much appreciated!!! -
Stephanie from AZWe love MAC!
Everything was great from the explanation of everything, walking us through the ups and downs, and completing the process with us. Great experience! We definitely will work with this team again!
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Please contact us @ 928-350-2400 for availability as our inventory changes rapidly. Little Dealer Little Prices strives for accurate website information but is not responsible for misprints, typos, or errors on our website. Manufacturer or sample photos and specifications may be used in place of actual unit photos and specs. Monthly payments are an estimate only and do not constitute a commitment that financing or a specific interest rate or term is available. Prices exclude taxes, PDI, documentation and delivery fees, destination charges and fees. This offer expires when this information changes or the stock number is sold.
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