2025 Grand Design Momentum M-Class 414M – Luxury Toy Hauler at Sonny’s RVs in Casper, WY
The 2025 Grand Design Momentum M-Class 414M is one of the most powerful, spacious, and luxurious toy haulers in the nation—and you’ll find it right here at Sonny’s RVs in Casper, Wyoming, the state’s premier Grand Design dealership.
Top Features of the 2025 Momentum M-Class 414M
*** PREVIOUS OWNER HAD PURCHASED AN EXTRA DOOR FOR THE FRONT MASTER CLOSET DOORS***
- Massive 46' 4" luxury toy hauler built for serious adventure
- 6 pt. Hydraulic Leveling System
- 6k-watt Generator, Fuel Station, & Solar
- Three giant slide outs for expanded living space
- Three power awnings for outdoor shade & entertainment
- Tall 8.4 ft interior height for a true residential feel
- Large rear garage perfect for ATVs, UTVs, bikes & gear
- Full-size Norcold residential refrigerator & upgraded kitchen appliances
- Four-burner cooktop + convection oven
- Plush sofa seating, recliners & premium décor
- Sleeps up to 9 comfortably (king bed, queen bed, bunks, convertible beds)
- Tankless water heater + Rockford Fosgate premium entertainment
- Exterior patio/deck system for next-level campsite living
- Designed for extended travel, off-grid trips & full-time RVing
- Inside & Outside Speakers
- TV Outside
***PREVIOUS OWNER ADDED SEVERAL ADDITIONAL UPGRADES TO FW***
About the 2025 Grand Design Momentum M-Class 414M
The Grand Design Momentum M-Class 414M is engineered for travelers who expect more—more space, more power, more features, and more freedom. As one of the largest and most luxurious toy haulers in the Momentum lineup, the 414M brings the Grand Design quality RVers love, paired with a garage and living layout built for every kind of adventure Wyoming has to offer.
Inside, the 414M feels like a high-end residential suite. The massive living area includes upgraded recliners, plush seating, entertainment options, and Grand Design’s signature attention to detail. The chef’s kitchen offers everything you need for extended stays, from a residential refrigerator to a convection microwave and four-burner stove. This model is perfect for riders, families, explorers, and long-haul travelers who demand the best in the toy-hauler segment.
Sleeping up to nine people, the 414M provides room for everyone—making it ideal for large groups or anyone who travels with toys and friends in tow. With a rear patio deck, three awnings, and plenty of outdoor living capability, the Momentum 414M transforms every campground into a luxury destination.
Why Buy Your Grand Design Toy Hauler from Sonny’s RVs?
Sonny’s RVs is Wyoming’s #1 Grand Design Dealer, proudly serving Casper, Douglas, Gillette, Riverton, Wheatland, Glenrock, Sheridan & beyond. As a trusted Grand Design partner, we offer one of the best selections of Grand Design Momentum, Reflection, Imagine, and Solitude RVs in the state.
Our team knows Grand Design — inside and out. Whether you’re comparing models, exploring toy haulers, or looking for long-term reliability, Sonny’s RVs delivers expert guidance, transparent pricing, and a family-owned dealership experience you can count on.
If you're searching for Grand Design toy haulers in Wyoming, Momentum dealers near me, or the best place to buy a Grand Design RV, Sonny’s RVs is your trusted home for all things adventure.
Financing Made Easy
Get fast approvals, competitive RV loan rates, and flexible terms designed for Wyoming families. Whether you're upgrading, downsizing, or buying your first toy hauler, we make financing simple and stress-free.
Apply today and get pre-approved.
Trade-In & Trade-Up
Have an RV, toy hauler, fifth wheel, or travel trailer you're ready to upgrade? Bring it to Sonny’s RVs. We offer fair trade-in values and help you move into your next Grand Design with ease.
Value your trade instantly with our online tool or stop by anytime.
