2026 Grand Design Momentum M-Class 399M - MM5074
For Sale in Egg Harbor City, NJ.

Price: $164,995

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Sale! In Stock
  • PRIMARY INFORMATION

  • Stock #MM5074
  • Year2026
  • ManufacturerGrand Design RV
  • MakeGrand Design
  • ModelMomentum M-Class
  • Floorplan399M
  • TypeToy Hauler
  • ConditionNew
  • Length44' 0"
  • VIN573FM4738TBB04794
  • MSRP$197,791.00
  • Price$164,995.00
  • Sale Price$149,995.00
  • SPECS

  • Chassis101" Wide Body Super Chassis w/Drop-Frame Storage
  • InteriorARTISAN
  • ExteriorWHITE
  • Sleeps6
  • Water Capacity (Fresh)140 gal
  • Water Capacity (Black)52 gal
  • Water Capacity (Grey)104 gal
  • Air Conditioners3
  • A/C Spec30,000 BTU
  • GVWR22,500 lbs
  • Slideouts3
  • Dry Weight19,408 lbs
  • Payload Capacity3,092 lbs
  • Tow/Hitch Weight3,464 lbs

Description


This RV is available for sale at our GALWAY TWP location: 920 West White Horse Pike, Egg Harbor City, NJ.

2026 Grand Design Momentum 399M – Fully Equipped, Luxury Toy Hauler

• 12' 6" garage with P2K power bed lift, tie-down system, dual-entry ramp patio, and rear aluminum deck system w/ rear power awning
Triple-AC comfort including 3rd A/C and main A/C with heat pump for extended-season camping
Onboard 6kW generator for true off-grid capability
MorRyde 7K Independent Suspension 2.0 w/ DISC brakes—superior handling, towing, and stopping power
Solar ½ Package for better battery support while boondocking
GEN III 3-season glass sliding door—keeps the garage comfortable in all weather
Exterior patio package with side patio, Momentum patio chairs, 65" TV, griddle, and oversized awnings
Rockford Fosgate Stage 1 stereo for premium sound inside and out
Luxury living area featuring full recline seating, 50" TV, smart storage entertainment wall, hybrid dinette workstation & large windows
Chef-ready kitchen with 20 cu. ft. refrigerator, pull-out countertop extension, microwave, oven, and deep pantry
Spacious bath with walk-in shower, linen cabinet & premium fixtures
Upgraded KING bed suite with washer/dryer prep, dresser storage & TV prep
Pass-thru storage, universal docking station & triple aluminum Solid Step entries
Slide-out toppers installed for added protection and reduced maintenance
Why This RV Will Work for You: Ideal for toy hauler buyers needing a true multi-zone coach—garage for toys or second bedroom, side patio for entertaining, and luxury residential comfort for long-term travel.

Choosing White Horse RV Center in NJ means more than just buying an RV; it’s about investing in a seamless, enjoyable experience filled with benefits. With over 50 years of expertise, we ensure your RV journey is fun and hassle-free. Our RV essentials package and transparent pricing guarantee no surprises. Plus, enjoy a complimentary membership in the RT66 Customer Care Promises, providing peace of mind on the road. Experience the difference with White Horse RV Center—your trusted partner in RV adventures.
White Horse RV – Your RV adventure starts here.

Each write-up may have unintended errors. Please call to ensure the description is accurate.

White Horse RV Center

920 W. White Horse Pike (Rt. 30)
Egg Harbor City, New Jersey


Phone: 609-404-1717

Fax: 609-404-0413

Contact White Horse RV Center


Features

Appliances

  • Electric Heat
  • Furnace
  • Microwave
  • Refrigerator

Electrical

  • 50 Amp Service
  • Converter
  • Generator
  • Inverter
  • Solar Panels
  • Solar Prep

Equipment

  • LED Lights
  • Smart TV
  • TV
  • TV Antenna

Exterior

  • Awning
  • Exterior Speakers
  • Ramp
  • Skylight
  • Tinted Windows

Interior/Furnishings

  • Bench Seat
  • Central Vacuum
  • Fireplace
  • Medicine Cabinet
  • Queen Bed
  • Shower
  • Toilet

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