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We do our best to keep listing details accurate, but pricing, specifications, and availability come from third-party sources and can change without notice. We can't guarantee accuracy, so please confirm the details with the dealer before making any decisions. See something inaccurate? Contact us.

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    3. 2026 Keystone RV Montana 3900RK

    2026 Keystone RV Montana 3900RK

    NewFifth wheel|Stock #BF1184|Located at Ancira RV in Boerne, TX
    $119,995$163,081
    Save $43,086
    RV Envy

    2026 Keystone RV Montana 3900RK

    New · Fifth wheel

    $119,995$163,081Save $43,086

    Ancira RV

    30500 Ih 10 W

    Boerne, TX 78006

    (888) 456-2730

    Stock #BF1184

    2026 Keystone RV Montana 3900RK floor plan

    Specifications

    Length43 ft 10 in
    Sleeps4 people
    Slideouts4

    Full specifications

    AC BTU31500 btu
    Available BedsKing
    Awning Info14' and 18' Lippert 12V Electric w/LED Lights
    Axle Count2
    Convection CookingYes
    Cooktop Burners4
    Exterior ColorWHITE
    Furnace BTU35000 btu
    LP Tank Capacity20 lbs
    Number of Awnings2
    Number of LP Tanks2
    Refrigerator Size20 cu ft
    Refrigerator Type12V
    Shower Size30" x 48"
    Shower TypeStandard
    Sleeps4
    Slides4
    TV InfoLR 55" 4K Smart TV
    Washer/Dryer AvailableYes
    Water Heater TypeOn Demand

    Options and equipment may differ from those listed. We do our best to ensure accuracy, but please confirm all details with the dealer before purchase.

    Get more info

    2026 Montana 3900RK

    2026 Montana 3900RK
    I'm interested in
    Preferred contact method
    EmailPhone callText message

    The dealer sees only your first name and general area, not your full name, email, or phone. You'll chat through RV Envy and can share your info anytime.

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    Dealer information

    Ancira RV

    30500 Ih 10 W
    Boerne, TX 78006
    (888) 456-2730

    Keystone Montan fifth wheel 3900RK highlights:

    • Rear Kitchen

    • Dual Bath Sinks

    • Exterior Pull-Out TV

    • Bar with Wine Refrigerator

    It will be so easy to enjoy trips in this spacious fifth wheel! There are four slides found throughout, giving your crew plenty of space to stretch out and relax. You can prepare your best meals in the rear kitchen that includes a four-burner range, convection microwave, dishwasher prep, and multiple overhead cabinets for storage. There is a pull-out dinette for dining space, along with an L-shaped sofa and a bar with a wine refrigerator to entertain guests. The middle half bath features washer/dryer prep and storage, making this space the perfect mud room that is just steps away from the main entry door. The spacious master bedroom includes a king bed slide out, a bedroom fireplace and a dresser with a TV, plus a large front bath with dual bah sinks and a master closet! Outside, two power awnings, dual pull-out storage trays, and a pull-out TV makes the exterior just as accommodating as the interior!

    Enjoy luxury, innovation, and the outdoors in any one of Montana's finest fifth wheels. Each set the standard with exceptional features, and exciting factory installed options to provide you a great home on the road. Keystone's 12" I-beam chassis with z-frame technology provides a strong and durable foundation to your fifth wheel, and the four-season living package will help extend your camping season. There are also square frameless windows outside, along with storage solutions, and a hydraulic leveling system that will have you set up in no-time! Inside, you'll love the hardwood cabinetry, solid surface countertops, spacious showers, and cozy bedrooms!

    Keystone Montan fifth wheel 3900RK highlights:

    • Rear Kitchen

    • Dual Bath Sinks

    • Exterior Pull-Out TV

    • Bar with Wine Refrigerator

    It will be so easy to enjoy trips in this spacious fifth wheel! There are four slides found throughout, giving your crew plenty of space to stretch out and relax. You can prepare your best meals in the rear kitchen that includes a four-burner range, convection microwave, dishwasher prep, and multiple overhead cabinets for storage. There is a pull-out dinette for dining space, along with an L-shaped sofa and a bar with a wine refrigerator to entertain guests. The middle half bath features washer/dryer prep and storage, making this space the perfect mud room that is just steps away from the main entry door. The spacious master bedroom includes a king bed slide out, a bedroom fireplace and a dresser with a TV, plus a large front bath with dual bah sinks and a master closet! Outside, two power awnings, dual pull-out storage trays, and a pull-out TV makes the exterior just as accommodating as the interior!

    Enjoy luxury, innovation, and the outdoors in any one of Montana's finest fifth wheels. Each set the standard with exceptional features, and exciting factory installed options to provide you a great home on the road. Keystone's 12" I-beam chassis with z-frame technology provides a strong and durable foundation to your fifth wheel, and the four-season living package will help extend your camping season. There are also square frameless windows outside, along with storage solutions, and a hydraulic leveling system that will have you set up in no-time! Inside, you'll love the hardwood cabinetry, solid surface countertops, spacious showers, and cozy bedrooms!

    Specifications

    Length

    43 ft 10 in

    Sleeps

    4 people

    Slideouts

    4

    Specifications

    Length

    43 ft 10 in

    Sleeps

    4 people

    Slideouts

    4

    Unit features & options

    • 12" I-beam w/ z-frame technology
    • Helux Pin Box
    • 2" thick composite backed high gloss fiberglass sidewalls and insulated rear wall
    • 4k Square Frameless tinted safety glass windows
    • Dual pane frameless windows w/ safety tint (optional)
    • Fiberglass front cap w/ KeyShield automotive-grade paint
    • Fully walkable roof w/ Alpha seamless TPO membrane system and 5" rafters
    • Rear ladder
    • Hydraulic slideouts on main level w/ individual switches & electric slideouts on upper deck
    • Insulated underbelly w/ forced hot air & electric tank heaters
    • Curt TCS (Touring Coil Spring) 8K Axles
    • Curt ABS (Anti-Lock Braking System)
    • 17.5" Wheels
    • H-Rated Tires
    • TPMS Prep
    • 6' 6" tall 30" wide entry door w/ screen & friction hinge
    • 4 Step entry steps w/ strut assist
    • Large pass-through storage w/ oversized slam latch door
    • Premium oversized steel slide out storage tray
    • Slide Out rear Gear Storage Trays.
    • Back-up camera prep
    • 2nd battery disconnect dedicated to residential refrigerator (inverter models)
    • Dual battery boxes
    • Water connections, black tank flush, outside shower w/ quick connect hose, winterization kit, water heater bypass, power tank fill, waste & water handle valves, 110V outlet, shutoff valve, 12V compartment light, enclosed low point drains, intuitive KeyTV satellite/cable/ antennae source control

    Unit features & options

    • 12" I-beam w/ z-frame technology
    • Helux Pin Box
    • 2" thick composite backed high gloss fiberglass sidewalls and insulated rear wall
    • 4k Square Frameless tinted safety glass windows
    • Dual pane frameless windows w/ safety tint (optional)
    • Fiberglass front cap w/ KeyShield automotive-grade paint
    • Fully walkable roof w/ Alpha seamless TPO membrane system and 5" rafters
    • Rear ladder
    • Hydraulic slideouts on main level w/ individual switches & electric slideouts on upper deck
    • Insulated underbelly w/ forced hot air & electric tank heaters
    • Curt TCS (Touring Coil Spring) 8K Axles
    • Curt ABS (Anti-Lock Braking System)
    • 17.5" Wheels
    • H-Rated Tires
    • TPMS Prep
    • 6' 6" tall 30" wide entry door w/ screen & friction hinge
    • 4 Step entry steps w/ strut assist
    • Large pass-through storage w/ oversized slam latch door
    • Premium oversized steel slide out storage tray
    • Slide Out rear Gear Storage Trays.
    • Back-up camera prep
    • 2nd battery disconnect dedicated to residential refrigerator (inverter models)
    • Dual battery boxes
    • Water connections, black tank flush, outside shower w/ quick connect hose, winterization kit, water heater bypass, power tank fill, waste & water handle valves, 110V outlet, shutoff valve, 12V compartment light, enclosed low point drains, intuitive KeyTV satellite/cable/ antennae source control

    Full specifications

    As provided in the original listing

    AC BTU31500 btu
    Available BedsKing
    Awning Info14' and 18' Lippert 12V Electric w/LED Lights
    Axle Count2
    Convection CookingYes
    Cooktop Burners4
    Exterior ColorWHITE
    Furnace BTU35000 btu
    LP Tank Capacity20 lbs
    Number of Awnings2
    Number of LP Tanks2
    Refrigerator Size20 cu ft
    Refrigerator Type12V
    Shower Size30" x 48"
    Shower TypeStandard
    Sleeps4
    Slides4
    TV InfoLR 55" 4K Smart TV
    Washer/Dryer AvailableYes
    Water Heater TypeOn Demand

    Full specifications

    As provided in the original listing

    AC BTU31500 btu
    Available BedsKing
    Awning Info14' and 18' Lippert 12V Electric w/LED Lights
    Axle Count2
    Convection CookingYes
    Cooktop Burners4
    Exterior ColorWHITE
    Furnace BTU35000 btu
    LP Tank Capacity20 lbs
    Number of Awnings2
    Number of LP Tanks2
    Refrigerator Size20 cu ft
    Refrigerator Type12V
    Shower Size30" x 48"
    Shower TypeStandard
    Sleeps4
    Slides4
    TV InfoLR 55" 4K Smart TV
    Washer/Dryer AvailableYes
    Water Heater TypeOn Demand

    Price history

    Days listed

    65

    Price drops

    2

    Total price reduction

    -$10,000

    Sign in to see 2 price changes

    Price history

    Days listed

    65

    Price drops

    2

    Total price reduction

    -$10,000

    Sign in to see 2 price changes

    Get more info

    2026 Montana 3900RK

    2026 Montana 3900RK
    I'm interested in
    Preferred contact method
    EmailPhone callText message

    The dealer sees only your first name and general area, not your full name, email, or phone. You'll chat through RV Envy and can share your info anytime.

    We'll add you to our weekly newsletter too, but you can unsubscribe at anytime.