Unit Specs
- Stock #31603
- Year2026
- ManufacturerKeystone RV
- Make Keystone
- ModelMontana
- Floorplan3900RK
- Type Fifth Wheel
- ConditionNew
- Length43' 10"
- VIN4YDFM0V20T4700930
- Price $120,295.00
- Need to know your payment? Use our RV Loan Calculator!
- Sleeps6
- Water Capacity (Black)100 gal
- Water Capacity (Grey)150 gal
- Slideouts4
Looking to buy a 2026 Keystone Montana Fifth Wheel RV?
View a video of this 2026 Keystone Montana 3900RK RV on YouTube!
Your camping memories will be unforgettable in this 2026 Keystone Montana 3900RK. This 2026 Keystone Montana 3900RK welcomes you into the Keystone family! If you’re looking for a family RV, you’ve found it: this rig sleeps 6. You won’t believe how big this RV feels with 4 slides.
2026 Keystone Montana 3900RK Features
2026 Keystone Montana 3900RK Specifications
Dimensions
Height
13' 4"
Length
43' 10"
Weights
Dry Weight
17,085 lbs
GVWR
19,405 lbs
Hitch Weight
3,405 lbs
Payload Capacity
2,320 lbs
Capacities
Refrigerator Capacity
20 cu ft
Sleep Capacity
6
Water Capacity - Black
100 gal
Water Capacity - Fresh
77 gal
Water Capacity - Grey
100 gal
Exterior
# Awnings
2
# Axles
2
# Doors
1
# Slides
4
Chassis
12" I-beam w/ z-frame technology
Hitch
Fifth Wheel
Electrical
# A/C
3
A/C Spec
18K Furrion Chill Cube Main A/C with heat pump, 13.5 K Furrion AC for 2nd and 3rd ACs
2026 Keystone Montana 3900RK Literature
2026 Keystone Montana Brochure 1
Call:
231-428-4499
Stock #: 31603
Dealer Info
![Lakeshore RV]()
Unit Specs
- Stock #31603
- Year2026
- ManufacturerKeystone RV
- Make Keystone
- ModelMontana
- Floorplan3900RK
- Type Fifth Wheel
- ConditionNew
- Length43' 10"
- VIN4YDFM0V20T4700930
- Price $120,295.00
- Need to know your payment? Use our RV Loan Calculator!
- Sleeps6
- Water Capacity (Black)100 gal
- Water Capacity (Grey)150 gal
- Slideouts4
Looking to buy a 2026 Keystone Montana Fifth Wheel RV?
Estimated Payment-
Interest Rate
% *(W.A.C.)
Term
Years
Down Payment $
*W.A.C. = With approved credit
Email Dealer
Request More Info on this 2026 Keystone Montana 3900RK Offered for sale by Lakeshore RV
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