Discover luxury on the road with the 2021 Keystone Montana 3931FB Step into the ultimate full-time RV experience with this meticulously engineered 41-foot fifth wheel that blends top-tier comfort, smart design and road-ready durability. Inside, you’ll find a spacious living area with three slide-outs that expand your living space into a home-like environment. The gourmet kitchen features a large island, full-size refrigerator, oven/stove and plenty of prep space—perfect for entertaining or relaxed evenings at the campground. The master suite gives you a king-size bed, ample wardrobe space, and an indulgent front bath with double vanity sinks, a glass-enclosed shower, and premium finishes. With a second half-bath plus generous storage, you’ll enjoy convenience and privacy no matter where you roam. Built on a strong foundation with a 16,500-lb GVWR, this Montana is crafted for long-haul travels and seasonal adventures alike. With 66 gallons of fresh water capacity and 88 gallons each of grey/black tank capacity, you’re equipped for extended stays. The full exterior features two power awnings, making it easy to create an outdoor retreat right at your campsite. Whether you’re planning weekend getaways or full-time living, this fifth wheel stands out with upscale touches, intelligent layout, and the trusted construction Keystone is known for. Embrace the world in comfort—your home-on-wheels awaits. 

Highlights at a glance: 41′+ of luxury living space with 3 slide-outs 

Gourmet island kitchen with full-size appliances 

Fully loaded

UPGRADED King-size bed in the master suite + premium front bath 

3 ACs

Spacious holding tanks for extended stays 

Two power awnings for outdoor lounge space 

Built for serious travel with 16,500 lb GVWR 

Key Specifications 

Length: 41 ft 4 in 

Width: 8 ft  

Exterior Height: ~13.42 ft  

Dry Weight (Base Weight): 13,542 lbs 

GVWR: 16,500 lbs 

Hitch Weight: 2,530 lbs 

Fresh Water Holding Tank: 66 gal 

Gray Water / Black Water: 88 gal each  

Number of Slide-Outs: 3  

Sleeps: Up to 4

Reach out today to learn more or schedule a walkthrough—this 2021 Keystone Montana 3931FB won’t wait long!