2021 Keystone Montana Legacy 3120 RL

Used Fifth Wheel in Sturtevant, Wisconsin, 53177

$39,740.22
Est. Payment: $303/mo
2021 Keystone Montana Legacy 3120 RL - Used Fifth Wheel For Sale by Prosser's Premium RV Outlet in Sturtevant, Wisconsin features TV, Microwave, Batteries, Toilet, Air Conditioning
2021 Montana Legacy 3120 RL by Keystone from Prosser's Premium RV Outlet in Sturtevant, Wisconsin
Used 2021 Keystone Montana Legacy 3120 RL available in Sturtevant, Wisconsin

Unit Specs

  • Blow Out Price
  • In Stock
  • Special
  • Stock #TR02133
  • Year2021
  • ManufacturerKeystone RV
  • Make Keystone
  • ModelMontana Legacy
  • Floorplan3120 RL
  • Floorplan LayoutFront Bedroom
    Mid Kitchen
    Rear Living Area
  • Type Fifth Wheel
  • ConditionUsed
  • Length35' 0"
  • Width8' 0"
  • VIN4YDF31228M4702133
  • MSRP $106,965.00
  • Price $39,740.22
  • Need to know your payment? Use our RV Loan Calculator!
  • Sleeps6
  • Air Conditioners2
  • Slideouts3
  • Payload Capacity4001 lbs
  • Dry Weight11,999 lbs

Towable RV Fifth Wheel LIKE BRAND NEW!!!!

Discover this 2021 Towable RV Fifth Wheel, model 3120 RL (stock TR02133), designed for comfortable travel with a spacious layout and practical onboard amenities. With three slideouts and a rear living area floorplan, this fifth wheel offers room to relax, dine, and unwind—whether you’re planning a weekend getaway or an extended road trip.

Comfortable Layout & Sleep Capacity

This unit is built for up to 6 people, making it a great fit for families or friends. The floorplan type includes Rear Living Area (also listed as Front Bedroom and Mid Kitchen options), helping you enjoy a functional flow between living space, cooking, and sleeping areas. The queen bed supports restful nights, while the onboard shower and toilet round out everyday convenience.

Key Amenities & Onboard Conveniences

Inside, you’ll find essential cooking and climate features for life on the road. The included furnace helps keep temperatures comfortable, while the microwave, oven, and stove top burner make meal prep straightforward. For food storage, the refrigerator is included, and hot water is supported by the water heater.

  • 3 slideouts for expanded interior space
  • 2 air conditioners for cooling flexibility
  • 50 Amp service for reliable power
  • Generator and batteries for added off-grid capability
  • Solar panels to support energy needs
  • Fantastic fan for ventilation

Safety, Entertainment & Outdoor Features

Safety is covered with a CO detector, LP detector, and smoke detector. For downtime, there’s a TV onboard. Outside, you’ll appreciate the external shower, plus the included ladder and leveling jacks to help with setup. A power awning adds shade when you want to relax outdoors.

Specs at a Glance

Length: 35 feet. Width: 8 feet. Dry weight: 11,999 pounds. GVWR: 16,000 pounds. Payload capacity: 4,001 pounds. Number of air conditioners: 2.

If you’d like to see this 2021 Towable RV Fifth Wheel in person, contact the dealer today or schedule a viewing for stock TR02133.

2021 Keystone Montana Legacy 3120 RL Features


  • Appliances
    Furnace, Microwave, Oven, Refrigerator, Stove Top Burner, Water Heater
  • Electrical
    50 Amp Service, Air Conditioning, Batteries, Fantastic Fan, Generator, Solar Panels
  • Equipment
    CO Detector, LP Detector, Smoke Detector, TV
  • Exterior
    External Shower, Ladder, Leveling Jacks, Power Awning, Slideout
  • Interior/Furnishings
    Queen Bed, Shower, Toilet

2021 Keystone Montana Legacy 3120 RL Literature


Stock #: TR02133
Dealer Info

Prosser's Premium RV Outlet

13815 Leetsbir Rd.
Sturtevant, WI 53177

Member Since 2025

See 307 Reviews

Unit Specs

  • Blow Out Price
  • In Stock
  • Special
  • Stock #TR02133
  • Year2021
  • ManufacturerKeystone RV
  • Make Keystone
  • ModelMontana Legacy
  • Floorplan3120 RL
  • Floorplan LayoutFront Bedroom
    Mid Kitchen
    Rear Living Area
  • Type Fifth Wheel
  • ConditionUsed
  • Length35' 0"
  • Width8' 0"
  • VIN4YDF31228M4702133
  • MSRP $106,965.00
  • Price $39,740.22
  • Need to know your payment? Use our RV Loan Calculator!
  • Sleeps6
  • Air Conditioners2
  • Slideouts3
  • Payload Capacity4001 lbs
  • Dry Weight11,999 lbs

Estimated Payment-

Interest Rate % *(W.A.C.)
Term Years
Down Payment $
*W.A.C. = With approved credit

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Prosser's Premium RV Outlet
Prosser's Premium RV Outlet

13815 Leetsbir Rd.
Sturtevant, WI 53177

Phone: Click to Call

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2021 Keystone Montana Legacy 3120 RL Gallery
Used 2021 Keystone Montana Legacy 3120 RL available in Sturtevant, Wisconsin
2021 Keystone Montana Legacy 3120 RL - Used Fifth Wheel For Sale by Prosser's Premium RV Outlet in Sturtevant, Wisconsin features TV, Microwave, Batteries, Toilet, Air Conditioning
2021 Montana Legacy 3120 RL by Keystone from Prosser's Premium RV Outlet in Sturtevant, Wisconsin
Used 2021 Keystone Montana Legacy 3120 RL available in Sturtevant, Wisconsin